Wear Test Comparison – AMSOIL vs. Harley Screamin’ Eagle
The recent introduction of Screamin’
Eagle® Synthetic Lubricant by Harley-Davidson® indicates the Motor Company has finally recognized the benefits of running synthetic motorcycle oil in their air-cooled engines. After years of advising dealers and customers to avoid using synthetic oils in their bikes, it’s natural to wonder why the company is suddenly marketing one.
For the past 20 years, Harley-Davidson® has claimed its petroleum-based Genuine H-D Oil is best for the “unique requirements of Harley-Davidson® air-cooled V-twin engines.” However, laboratory testing has consistently revealed that Genuine H-D Oil does not provide the best protection possible for Harley-Davidson® engines. In fact, Four-Ball Wear Tests show Harley- Davidson® 20W-50 Motorcycle Oil leaves a wear scar nearly 80 percent larger than that left by AMSOIL Synthetic 20W-50 Motorcycle Oil.
One of the major benefits of running a synthetic motorcycle oil is its resistance to oxidation and thermal degradation, which inhibit the formation of sludge and deposits that contribute to increased wear. In the past, Harley-Davidson® has defended use of its Genuine H-D Oil by arguing that oil breakdown in extreme heat is a non-issue because extreme heat conditions are not normally faced by motorcycle engines, while the superior cold-temperature benefits of synthetics also don’t apply to Harleys.

Four-Ball Wear Test (ASTM D4172)
The Four-Ball Wear Test is the industry’s standard test
method for measuring the wear preventive characteristics of a
lubricant. Placed in a bath of the test lubricant, three
fixed steel balls are put into contact with a fourth ball in rotating
contact at preset test conditions. Lubricant wear protection
properties are measured by comparing the average
wear scars on the three fixed balls. The smaller the
average wear scar, the better the protection.
The fact is, engine oil in Harley-Davidson® motorcycles is subject to very high temperatures. Being air-cooled, Harley-Davidson® engines get especially hot while idling in traffic, commonly reaching temperatures up to 240 degrees Fahrenheit. As heat and oxidation increase, so does viscosity, adversely affecting the lubricating qualities of the oil and increasing wear.
The water, soot and acid byproducts of combustion also contribute to deposit formation. Harley-Davidson® has stressed the importance of regular oil changes in order to remove these contaminants. Of course, promoting regular oil changes is also a good way to promote using petroleum-based Genuine H-D Oil. High-quality synthetic oils formulated with high-performance additives effectively withstand such contaminants, allowing motorcyclists to safely extend drain intervals.
In support of their about-face and the introduction of a synthetic oil, Harley maintains that “the Motor Company has never supported the use of synthetic products in our vehicles because there has never been any test validations completed on the numerous formulations in HD/Buell motorcycles. This product has been exclusively designed for Harley-Davidson® and is the only synthetic product TESTED and CERTIFIED by Harley-Davidson® engineering for use in HD/Buell motorcycles.”
Although this is necessary marketing hype, Harley-Davidson® V-twin air-cooled engines are not unique in their lubrication requirements and do not require a special Harley-only fluid. There is nothing about Screamin’ Eagle® Synthetic Motorcycle Oil that sets it apart from, or makes it better than, many other synthetic motorcycle oil formulations, except that Harley-Davidson® is marketing it and directly profiting from the sales.
According to Harley-Davidson®, one of the unique benefits offered by Screamin’ Eagle® Synthetic Motorcycle Oil is its versatility. For the first time the company is recommending an oil that can be used in the engines, primary chaincases and transmissions of most Harley-Davidson® motorcycles, including Evolution XL, Evolution 1340, Twin Cam 88 and 88B, Revolution and Buell models. This feature, however, is not unique. AMSOIL 20W-50 Synthetic Motorcycle Oil may also be used in the engines, primary chaincases and transmissions of these applications, providing superior lubricating protection in each component.
How does Screamin’ Eagle® Synthetic Motorcycle Oil measure up to AMSOIL in wear protection? Four-Ball Wear Test results indicate that AMSOIL Synthetic Motorcycle Oil still provides the best protection possible for motorcycles. In fact, Screamin’ Eagle® Synthetic Motorcycle Oil leaves a wear scar nearly 80 percent larger than AMSOIL 20W-50 Synthetic Motorcycle Oil.
Not only does AMSOIL Synthetic Motorcycle Oil offer greater wear protection than Screamin’ Eagle® Synthetic Motorcycle Oil, it also delivers greater value. Suggested retail price of Screamin’ Eagle® is nearly $2 a quart higher than AMSOIL 20W-50 Motorcycle Oil. And because AMSOIL Synthetic Motorcycle Oil may be used for extended drain intervals of up to twice the manufacturer’s suggested interval, while Screamin’ Eagle® is recommended for standard drain intervals, AMSOIL customers realize additional savings.
Harley-Davidson® claims Screamin’ Eagle® Synthetic Motorcycle Oil has been “exclusively designed” for use in their motorcycles, pointing to extensive bench testing and over 230,000 miles of durability testing to back it up. AMSOIL INC. has 30 years of experience providing superior lubricating protection for all brands of motorcycles, and AMSOIL Synthetic Motorcycle Oils have been tested in millions of over-the-road miles. Testimonials from countless motorcyclists further demonstrate the superiority of AMSOIL Synthetic Motorcycle Oils.
Formulated with top-of-the-line synthetic base stocks and high-temperature deposit control additives, AMSOIL Synthetic Motorcycle Oils provide superior protection and performance for motorcycles in all operating conditions. AMSOIL Motorcycle Oils effectively withstand oxidation and thermal degradation, keep wear to an absolute minimum, hold contaminants in suspension and keep engines running cool and clean.
AMSOIL Synthetic Motorcycle Oils
- Reduce operating temperatures
- Keep engines clean and deposit-free
- Provide maximum protection against wear
- Formulated without friction modifiers for smooth performance
- Saves money with extended drain intervals of up to two times the manufacturers’ recommendations
AMSOIL Synthetic 10W-30 Motor Oil (ATM) and 10 competing conventional, synthetic and synthetic blend 10W-30 motor oils were subjected to a series of motor oil tests. The competing oils included petroleum-based Castrol GTX, Chevron Supreme, Havoline, Formula Shell and Pennzoil, as well as synthetic-blends Trop Artic and Motorcraft, and full-synthetic Pennzoil Platinum, Quaker State Advanced Full Synthetic and Mobil 1 Extended Performance.
Seven tests were run on the motor oils. The Thin-Film Oxygen Uptake Test (TFOUT) measures the oxidation stability of engine oils. The High Temperature/High Shear Test (HTHS) measures a lubricant’s viscosity under severe operating conditions. The NOACK Volatility Test measures the evaporation loss of oils in high temperature service. Pour Point indicates the lowest temperature at which a fluid will flow. Total Base Number (TBN) is the measurement of a lubricant’s reserve alkalinity for combating acids. The Cold Cranking Simulator Test (CCS) indicates the degree to which a lubricant can impact cold weather starting. The impressive test results show AMSOIL Synthetic 10W-30 Motor Oil outperformed the competitors in nearly every test.
| Motor Oils Tested | Test Areas |
| AMSOIL ATM Mobil 1 Extended Performance Quaker State Advanced Full Synthetic Pennzoil Platinum Trop Artic Motorcraft Castrol GTX Chevron Supreme Havoline Formula Shell Pennzoil |
Thin Film Oxygen Uptake High Temperature/High Shear NOACK Volatility Pour Point Total Base Number Cold Cranking Simulator Four-Ball Wear |
Extends Oil Life
The Thin Film Oxygen Uptake Test (TFOUT) is used to evaluate engine oil’s ability to resist heat and oxygen breakdown when contaminated with oxidized/nitrated fuel, water, and soluble metals such as lead, copper, iron, manganese and silicon. This test is designed to mimic the operating conditions of a gasoline engine. AMSOIL 10W-30 Synthetic Motor Oil has superior heat and oxidation resistance to control sludge deposits and extend oil life. Engines stay clean for maximum protection and oil changes are reduced, saving time and money.

Protects Hot Engines
The High Temperature/High Shear Test measures a lubricant’s viscosity under severe high temperature and shear conditions that are similar to severe service applications in an engine. In order to prevent wear, it is important for a lubricant to maintain its protective viscosity level under severe operating conditions.
AMSOIL 10W-30 Synthetic Motor Oil does not “shear back” and thin out like other motor oils. Its superior viscosity stability provides unsurpassed bearing protection for dependable engine operation, especially during hot operating conditions.

NOACK: Maximize Fuel Economy, Reduce Emissions
The NOACK Volatility Test determines the evaporation loss of lubricants in high temperature service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions.
AMSOIL 10W-30 Synthetic Motor Oil resists high temperature volatilization (evaporation) better than other motor oils. AMSOIL Synthetic Motor Oil maintains peak fuel efficiency and reduces oil consumption and emissions.

Improves Cold Temperature Startup
The Pour Point Test determines the lowest temperature at which a lubricant will flow. The lower a lubricant’s pour point, the better protection it provides in low temperature service. Unlike conventional oils that solidify in cold temperatures, AMSOIL 10W-30 Synthetic Motor oil remains fluid down to -58° F. AMSOIL Synthetic Motor Oil helps engines turn over easier and flows quickly to engine parts for critical start-up protection. Engines start faster and wear is greatly reduced for extended engine life.

Controls Acid Formation
Total Base Number (TBN) is the measurement of a lubricant’s reserve alkalinity, which aids in the control of acids formed during the combustion process. The higher a motor oil’s TBN, the more effective it is in suspending wear-causing contaminants and reducing the corrosive effects of acids over an extended period of time.
The high TBN of AMSOIL Synthetic 10W-30 Motor Oil allows it to effectively combat wear-causing contaminants and acids, providing superior protection and performance over extended drain intervals.

Helps Engines Start Easier
The Cold Crank Simulator Test determines the apparent viscosity of lubricants at low temperatures and high shear rates. Viscosity of lubricants under these conditions is directly related to engine cranking and startability. The lower a lubricant’s cold crank viscosity, the easier an engine will turn over in cold temperatures. The low cold crank viscosity of AMSOIL Synthetic 10W-30 Motor Oil reduces drag on moving engine parts and allows engines to achieve critical cranking speed in extremely frigid temperatures. Engines turn over quickly and dependably in the coldest winter temperatures.

Protects Against Wear
The Four-Ball Wear Test evaluates the protection provided by engine oil under conditions of pressure and sliding motion. The size of the scar left as a result of the test determines the amount of wear protection the lubricant provides. The smaller the wear scar, the better the protection. Tests show that AMSOIL 10W-30 Synthetic Motor Oil has better antiwear performance than all other oils tested. With AMSOIL Synthetic Motor Oil, engine life can be extended and major repairs are often reduced.

Although each step to increasing your fuel economy only helps by a few percentage points, when you add them all up, you can save quite a bit of cash. The little bit of investment it takes to maximize your vehicle for better fuel economy is trivial when compared to the savings.
Step 1: Learn Better Driving Habbits
Aggressive driving such as speeding, rapid acceleration and braking wastes gas. It can lower your gas mileage by 33 percent at highway speeds and by 5 percent around town. Sensible driving is also safer for you and others, so you may save more than gas money. It’s important to learn to relax while you drive. Feeling anxious or trying to “rush” to your destination is costing you much more than you realize.
Equivalent Fuel Savings: $0.13 – $0.84 Per Gallon
Step 2: Slow Down (Follow the speed limit)

Graph: Fuel vs. Speed
While each vehicle reaches its optimal fuel economy at a different speed (or range of speeds), gas mileage usually decreases rapidly at speeds above 60 mph. As a rule of thumb, you can assume that each 5 mph you drive over 60 mph is like paying an additional $0.20 per gallon for gas. Observing the speed limit is also safer.
Equivalent Fuel Savings: $0.18 – $0.59 Per Gallon
Step 3: Use Amsoil Synthetic Lubricants
The advanced lubricity (slipperiness) of AMSOIL synthetic lubricants has been proven to increase fuel economy by up to 5%. Some tests have even shown increases of as much as 15% under certain weather and driving conditions. AMSOIL reduces friction and allows your engine to use its heat-energy more efficiently. The low intrafluid friction and metal-to-metal friction reducing properties of AMSOIL synthetic motor oils also improve fuel economy by delivering more of the energy created through combustion of the air-fuel mixture to the transmission.
Equivalent Fuel Savings: $0.05 – $0.13 Per Gallon
Step 4: Use Amsoil P.I. Fuel Additive

Amsoil PI
The newly formulated AMSOIL P.I. Performance Improver is the most potent gasoline additive available today. As a concentrated detergent, it is unsurpassed in cleaning combustion chamber deposits, intake valve deposits and port fuel injector deposits, eliminating the need for expensive fuel injector cleaning procedures. The product is ideal for use prior to emissions inspections. It also helps maintain peak engine efficiency, fuel economy, power and drivability in newer low mileage engines. In engines with accumulated deposits, testing showed AMSOIL P.I. provided the following clean-up benefits after only one tank of gasoline.
Equivalent Fuel Savings: $0.06 – $0.15 Per Gallon
Step 5: Check your tire pressure
Just by simply running on tires that have the recommended amount of tire pressure can save you about one mile per gallon, not to mention improving the life of your tires and the overall ride. If this seems like obvious advice, consider that under-inflation of tires is considered the most common car problem on the road today.
Equivalent Fuel Savings: $0.07 – $0.15 Per Gallon
Step 6: Check your air filter
According to the U.S. Department of Energy, replacing a clogged air filter can increase your mileage by 10 percent. Thats a big savings considering how inexpensive an air filter is.
Equivalent Fuel Savings: up to $0.26 Per Gallon
Step 7: Proper Maintenance
It is essential that your car is running healthy if you expect it to get good gas mileage. Fouled spark plugs, a dirty fuel filter or bad spark plug wires could all significantly affect your milage. A bad oxygen sensor could cost you as much as 40% loss in mileage according the the U.S. Department of Energy.
Equivalent Fuel Savings: up to $1.02 Per Gallon
Step 8: Wash and Wax
Regularly washing and waxing your vehicle improves aerodynamics and therefore affects fuel economy. Engineer Tom Wagner, Jr. reported to Stretcher.com (as in stretching your dollars) a 7-percent improvement in fuel economy, from 15 to 16 mpg, during a 1,600-mile road trip.
Equivalent Fuel Savings: up to $0.18 Per Gallon
Step 9: Take a load off
Avoid keeping unnecessary items in your vehicle, especially heavy ones. An extra 100 pounds in your vehicle could reduce your MPG by up to 2%. The reduction is based on the percentage of extra weight relative to the vehicle’s weight and affects smaller vehicles more than larger ones. Empty out your trunk (or even your backseat) of unnecessary items. If you have a roof rack or roof carrier, install it on your vehicle only when absolutely necessary. Not only does the carrier add extra weight, but it also increases the aerodynamic drag on the vehicle, which further contributes to a loss of fuel economy.
Equivalent Fuel Savings: up to $0.05 Per Gallon
Step 10: Use Cruise control
Using cruise control can improve your gas mileage by helping you maintain a steady speed, but only if you are driving on mostly flat roads. The constant slowing and accelerating caused by your foot on the petal consumes more fuel. If you are driving in hilly terrain, using cruise control typically causes your vehicle to speed up faster (to maintain the preset speed) than it would if you were operating the accelerator yourself. Just think abou the terrain ahead before you push that cruise control button. According to a recent test done by edmunds.com, using your cruise control can save you up to 14%.
Equivalent Fuel Savings: up to $0.36 Per Gallon
Step 11: Think about ventilation
Running your air conditioner does cause your vehicle to consume more fuel, but driving with your windows rolled down can be even worse due to the increase of drag on the vehicle. If you are driving slowly, such as around town or in city traffic, then you are better off leaving your windows open, if at all possible. For highway driving, roll up the windows and turn the air conditioning on.
Step 12: A little extra thinking
A little planning can make quite a difference in fuel economy. When your engine is cold, it uses more fuel than when it is warm. Combining errands can improve your gas mileage because your engine will be warm for more of the trip. It might also mean you travel less total miles. According to the DOE, several short trips all begun with a cold start can use twice as much fuel as a single, longer trip that covers the same distance.
Avoiding excess idling can also make a big difference. This seems a bit odvious, but it is easy to forget about. It’s simple fact that you get zero miles per gallon during idle. It’s just good habbit that if you are stopping more than a minute to simply shut it off. When you leave your car running while you are waiting in line at the drive-thru, or as you wait outside your kids’ school, you are wasting fuel.
Conclusion:
With a little work and a little thinking you can save yourself quite a bit of money in fuel costs. If you consider benefiting just a little from each of these steps, you be looking at a 20% increase in your overall fuel economy. That can easily translate in to hundreds or even thousands of dollars very quickly. With the current rise in fuel costs, it is more important than ever to use less fuel, therefor saving yourself money now while decreasing demand, saving yourself even more money in the future.
Stats based on $2.55 per gallon.
The Development of Synthesized Motor Oils: A Historic Review
No one a century ago could have foreseen the rapid transformations that science and invention would bring to our world. From rocket ships to microwaves, silicon chips to Dolly the cloned ewe — it has been an astonishing period of history. I mean, a hundred years ago we didn’t even have gas stations. Or highways. Or flat tires.
One of the transforming developments of our century has been the discovery of the process of organic synthesis, the combining of the raw materials of production into a nearly limitless array of plastics, films, fabrics and fluids. By understanding the geometry of organic compounds, chemists could create customized molecular designs to achieve preconceived objectives. Scientists realized that they could actually improve the characteristics of items found in nature.
One bi-product of this process has been the development of synthetic motor oil. It is believed that the first synthesized hydrocarbons were created by Friedel & Crafts in 1877 using Aluminum TriChrloride as the catalyst. Yet it wasn’t until 1929 that the commercial development of synthesized hydrocarbons was undertaken by Standard Oil of Indiana. Not surprisingly there was a lack of demand for the new product and this first marketplace introduction of synthetic lubricants was commercially unsuccessful. (There is probably no relationship between this event and collapse of stock market later that year.)
Eight years later the first PAO, a synthetic product using olefin polymerization, was manufactured. 1937 was also year that the Zurich Aviation Congress became interested in ester based lubricant technology. From 1938 to 1944 thousands of esters were evaluated in Germany with excellent results. In our own country ester basestocks were also being developed by the United States Naval Research Laboratory and introduced into military aviation applications during the 1940’s.
During this period scientists were well funded, and the new processes of synthetic creation had some great success. But as is so often the case, the existence of a “better mousetrap” does not always result in its commercial survival.
It was the space age that helped create a greater appreciation for the benefits of synthetic lubricants. Jet engines raised the bar on what was required of a lubricant. The high speed, high heat and cold temperature performance requirements of modern jets created a demand for a new kind of lubricant.
Just after the war we saw the first use of diesters by the British in turboprop engines for high temperature performance. And from the late forties to the early seventies various synthetic fluids were developed to meet the demands of new and more efficient high performance engines and machines.
Because of the self-evident cold weather benefits of synthetic jet engine oil, it would not have been difficult to find a few maverick pilots experimenting with this oil in their cars. The military paid thirty-five dollars a quart for synthetic oil in those days and even the used jet engine oil seemed clean enough for some pilots in Alaska and elsewhere to mix with their motor oil to assist cold winter starts.
One such experimenter took a more systematic approach. In the mid-1960’s, Lt. Col. Albert J. Amatuzio, jet fighter squadron commander at a northern Minnesota airbase, likewise had become familiar with these “extra ordinary” lubricants that protected the engines of the jets he flew. He began a research project that eventually became his life work and second career. At first, Amatuzio’s efforts were aimed at improving the performance of petroleum oil.
Eventually, Amatuzio realized the need to begin with a synthetic basetock and build his ideal lubricant from the ground up. His search led him to Monsanto, Drew Chemical Corporation and Hatco. It was Drew Chemical Corporation in Boonton, New Jersey, where the first polyol esters had been developed and patented in conjunction with Mobil Chemical in 1958. Mobil Oil’s Jet Engine Oil II was based on the fluids produced at Drew Chemical. The truth is, automobiles put even more stress on a lubricant than jet engines because air aspirated car engines must deal with dirt and the messy by-products of combustion. The problem was how to bring the expanded temperature range performance, wear protection and service life of a synthetic into an automotive setting. Amatuzio believed he had found a way. According to Jack Arotta, a Duluth Minnesota businessman today, “I was the first guy to put it (a specially formulated 100% synthetic motor oil) in a brand new car, a 1966 Ford Station Wagon. Al was my squadron commander up at the air base, so I always use the joke that since Al was my squadron commander, how could I not put it in when he told me to?”
Actually, for more than a year Jack had been putting a variety of Al’s synthetic formulations in his previous cars, so he did not feel that he was putting his vehicle at serious risk. After several more years of fine tuning his formulation, AMZOIL (Amatuzio-oil) was created and became the first 100% synthetic diester based engine oil to pass the API sequence tests and receive API qualification in 1972.
The following year Mobil Oil began marketing the first PAO based engine oil overseas and in 1975 they began test marketing a synthetic PAO based synthetic in the U.S. called Mobil 1.
Over time a growing niche of consumers became aware of the performance benefits synthetic offered. As additional products were developed, from synthetic diesel oil to two cycle oils, synthetic transmission fluids and gear lubes, so grew the interest. With growing market opportunity, more companies made contributions in the development of basestock fluids and new technologies, including the Gulf Oil Company (since acquired by Chevron), Chevron Corporation, Amoco, Ethyl Corporation, Exxon, Henkel, Castrol, Uniroyal, Lubrizol, Neste Chemical, and Texaco (additive technology and synfluids since acquired by Ethyl).
By the mid-nineties nearly every oil company carried a high end synthetic motor oil in its product line, though only a few companies seem truly dedicated to promoting them. Nevertheless, synthetic lubricants are currently the fastest growing segment of the oil industry and they are definitely here for the long haul.
All You Really Need to Know About Motor Oil Additives
It has been a long long time since motor oil was just oil. In the 1930s someone decided to begin putting wax modifier in the oil to address the problem of wax residue after the refining process. Thus was born the motor oil additive market.

Amsoil Lab
Today, motor oils contain a variety of ingredients designed to improve the performance capabilities of motor oil, whether petroleum or synthetic. This article is an overview of the various oil additives used in automobile engines and drivetrains.
Additives Job Descriptions
In this article we are referring to additives that are formulated into the motor oil, not the chemistries being packaged and sold as aftermarket oil additives on the shelves of auto parts stores.
Motor oil additives have three essential functions: to protect metal surfaces, to expand the lubricants application range, and to extend lubricant life. Additional considerations for additive selection include ease with which they can be handled by formulators, stability in storage, toxicity, and their smell. Yes, smell is a serious consideration.
Surface Protection Additives
In automobile motor oils there are five kinds of problems that additives address with regard to surfaces. First, there are antiwear agents. These would include various phosphates, organic sulfur and chlorine compounds, sulfurized fats, sulfides and disulfides. These various compounds reduce friction and wear, and help prevent scoring or seizure. Through chemical processes they help prevent metal-to-metal contact.
Corrosion and rust inhibitors like zinc dithiophosphates (a multi-purpose additive), metal phenolates, fatty acids and amines are used to prevent corrosion and rust on the internal metal parts of the engine.
Detergents keep surfaces free of deposits. By use of metallo-organic compounds of sodium, calcium and magnesium phenolates, phosphonates and sulfanates varnishes and sludge are neutralized and maintained in a soluble state.
Dispersants, such as alkylsuccinimides, alkylsuccinic esters and mannich reaction products, keep insoluble contaminants dispersed in the lubricant. Contaminants are bonded by polar attraction to dispersant molecules, preventing them from agglomerating.
Friction modifiers alter an oils coefficient of friction. Typical friction modifiers include organic fatty acids and amides, high molecular weight organic phosphorus and phosphoric acid esters.
Performance Additives

the finished product
A second class of additives includes those compounds that improve the oils performance. Pour point depressants, which are not required in high quality synthetics due to their low temperature capabilities, enable lubricants to flow at lower temperatures by modifying wax crystal formation, thereby reducing interlocking. The compounds used for this function include alkylated napthalene and phenolic polymers, polymethacrylates, and certain copolymer esters.
Seal swell agents help to swell elastomeric seals by causing a chemical reaction in the elastomer. Organic phosphates and aromatic hydrocarbons are sometimes used to achieve this effect.
Viscosity modifiers help reduce the rate of viscosity change when temperatures rise or drop. Polymers and copolymers of olefins tend to expand as the temperature rises, counteracting against the tendency of oil to thin. Other compounds used for this function include methacrylates, dienes and alkylated styrenes.
Protective Additives
There are also three types of protective additives. Antifoamants reduce surface tension and speed the collapse of foam. Foam is an enemy of effective lubrication. Wherever air can get into an active fluid system it has a tendency to get trapped or swirled in, with billowing or foaming the end result. Without defoamers, you would have foam gurgling out of the dipstick when customers came in for an oil change. To fight foam oil formulators add silicone polymers or organic copolymers.
Antioxidants slow down the rate of oxidation by decomposing peroxides and terminating free-radical reactions. Zinc dithiophosphates, hindered phenols, aromatic amines and sulfurized phenols are used to this end.
Metal deactivators are used to reduce catalytic effect of metals on the oxidation rate. In other words, without organic complexes containing nitrogen or sulfur, amines, sulfides and phosphites, the rate of oxidation would speed along unchecked. These compounds form form an inactive film on metal surfaces by complexing with metallic ions.
Whats Goin On?
In short, motor oil has a lot of stuff in it these days. It is not a haphazard concoction of chemicals just thrown together. As you can see, many of the compounds in motor oil are designed to interact with what is going on inside an engine. But many compounds are selected so that they will not interfere with their designated functions. That is to say, formulators are chemists who must carefully consider the way these various chemistries interact with each other, not just the context they individually work in.
One example is the battle between corrosion inhibitors and antiwear additives. Sometimes these additives battle for sites on a metal surface. If you use too much corrosion and rust inhibitor the antiwear properties of an oil can be diminished.
It is important to realize that additive chemistries can themselves have disadvantages as well as advantages. The usage of various additives involves tradeoffs. Here are just some examples of negative side effects additive may possess.
- Detergents and anti-wear additives can promote deposit formation in high temperature areas.
- Detergents and dispersants can promote foaming and minimize the effectiveness of anti-foaming additives.
- Certain additives can cause corrosion when exposed to high temperature.
- Too much anti-foaming additive will in itself result in foaming.
Conclusions
.Today’s additive systems are quite sophisticated. Because they can be sensitive and negatively affected by the addition of other chemicals some experts feel that lubricants of different brands or types should never be mixed. Nevertheless, motor oils are considered compatible with each other in todays market.
The rule of thumb here is that if an application does not require an additive do not use it. This holds true especially for aftermarket additives. Motor oil formulators go to great lengths to build balanced systems that meet pre-designed targets. Not only the choice of chemistries, but the concentration at which an additive is used will have a major impact both on how well a lubricant performs a task and on its cost.
AMSOIL INC. uses only the highest quality additives and thoroughly understands how each interact. Not only are the specific basestocks selected for their ability to provide extended drain intervals, but the additive package plays a vital role in a lubricants performance as well. As car manufacturers demand longer motor oil drain intervals, these aspects of lubricant performance will become increasingly important to all motor oil manufacturers.
Buy it locally from a stocking dealer…
Pike Equipment in Columbia Station is Just 15 minutes south-west of Cleveland. Here you can come in and buy Amsoil products right off the shelf.

Map - Pike Equipment in Columbia Station, Ohio
Map it out:
20 Minues from Cleveland
40 Minutes from Akron
15 Minutes from Medina
Angler Is “Hooked” On AMSOIL
Cleveland Guide Service Owner and Tournament Angler

David A Zgrabik
David A. Zgrabik of Cleveland, Ohio, owns a guide service and is also a tournament angler. His success depends on the reliability of his equipment. He says he has always used quality oils, but has never seen the performance and sheer benefits from other products like he has seen from the AMSOIL product lineup. After starting to run AMSOIL Series 2000 2-Cycle Racing Oil, I noticed considerably less smoke at start-up, improved idling and more power, David said. I even have an unexplainable 200 rpm increase! Davids tow vehicle is another important part of his business.
”I travel all over when I’m fishing and doing other promotional work”, David said. “After installing AMSOIL engine oil and an AMSOIL filter, I noticed a 10-15 degree temperature drop while the engine was operating. I was just amazed at how well it was working. There was also an increase in fuel mileage. There is no way I would do without my AMSOIL motor oil now!”
North East Ohio – Proper disposal of used motor oil
The United States generates about 1.3 billion gallons of used oil annually, according to the U.S. Environmental Protection Agency (EPA). The EPA defines used motor oil as any petroleum-based or synthetic oil that has been used for vehicle lubrication.
Did you know used oil can be re-refined into base stock for lubricating oil. If you recycle just two gallons of used oil it can generate enough electricity to run the average household for almost 24 hours. Motor oil has value even after it has been drained from an engine. The oil you take to a collection center to be recycled saves energy. It can be reprocessed and used in furnaces for heat or in power plants to generate electricity for homes, schools, and businesses. It can also be sent to a refinery that specializes in processing used oil and re-refined into lubricating base oils that can be used to formulate engine oils
There are several places where you can take your used motor oil:
- Cuyahoga County Solid Waste District Roundup
- Most parts stores such as Autozone, Advanced Auto Parts, Murray’s Auto or NAPA will take up to 4 gallons per day
- Walmart Tire and Lube Centers
- Tractor Supply
It’s a fact of life that behavior is strongly influenced by what people believe, whether true or not. Numerous examples from history bear this out. For example, sailors were once fearful of sailing outside the sight of land lest they would fall off the edge of the world. In the early 19th century, the train was considered dangerous because it was believed that if you moved faster than 25 miles per hour, you would be travelling too fast to breathe. At a later date, the New York Times warned that electric light may cause blindness. Microwave ovens, automobiles and airplanes have had equally vociferous opponents. Looking back, it’s easy to laugh at some of the things people so firmly believed. But these people were not stupid. They were simply misinformed. In many instances they had simply drawn conclusions before all the facts were in. How easy it is to make the same mistake today. In our own time, synthetic motor oils have been the object of numerous misconceptions held by the general public. Many people, including some mechanics who ought to know better, have been misled by persistent myths that need to be addressed.
Parameters of the Debate

Synthetic Motor Oil
Synthetic lubricants are fuel efficient, extended life lubricants manufactured from select basestocks and special purpose additives. In contrast to petroleum oils which are pumped from the earth and refined, synthetics are custom-designed in the laboratory, with each phase of their molecular construction programmed to produce, in effect, the ideal lubricant. In responding to the objections most commonly raised against synthetics it is important to establish the parameters of the debate. When speaking of synthetic motor oils, this article is defending the synthetic lubricants which have been formulated to meet the performance standards set by the American Petroleum Institute (API). (The first such synthetic motor oil to meet these industry-accepted tests for defining engine oil properties and performance characteristics was AMSOIL 100% Synthetic 10W-40 in 1972.) Many people with questions about synthetics haven’t known where to turn to get correct information. Is it super oil or snake oil? Some enthusiasts will swear that synthetics are capable of raising your specialty car from the dead. On the other hand, the next fellow asserts that synthetics will send your beloved car to an early grave. Where’s the truth in all this? In an effort to set the record straight, we’ve assembled here ten of the more persistent myths about synthetic motor oils to see how they stack up against the facts.
Myth #1: Synthetic motor oils damage seals.
Untrue. It would be foolhardy for lubricant manufacturers to build a product that is incompatible with seals. The composition of seals presents problems that both petroleum oils and synthetics must overcome. Made from elastomers, seals are inherently difficult to standardize. Ultimately it is the additive mix in oil that counts. Additives to control seal swell, shrinkage and hardening are required, whether it be a synthetic or petroleum product that is being produced.
Myth #2: Synthetics are too thin to stay in the engine.
Untrue. In order for a lubricant to be classified in any SAE grade (10W-30, 10W-40, etc.) it has to meet certain guidelines with regard to viscosity (“thickness”). For example, it makes no difference whether it’s 10W-40 petroleum or 10W-40 synthetic, at -25 degrees centigrade (-13F) and 100 degrees centigrade (212 degrees F) the oil has to maintain a standardized viscosity or it can’t be rated a 10W-40.
Myth #3: Synthetics cause cars to use more oil.
Untrue. Synthetic motor oils are intended for use in mechanically sound engines, that is, engines that don’t leak. In such engines, oil consumption will actually be reduced. First, because of the lower volatility of synlubes. Second, because of the better sealing characteristics between piston rings and cylinder walls. And finally, because of the superior oxidation stability (i.e. resistance of synthetics against reacting with oxygen at high temperatures.)
Myth #4: Synthetic lubricants are not compatible with petroleum.
Untrue. The synthesized hydrocarbons, polyalphaolefins, diesters and other materials that form the base stocks of high-quality name brand synthetics are fully compatible with petroleum oils. In the old days, some companies used untested ingredients that were not compatible, causing quality synlubes to suffer a bum rap. Fortunately, those days are long gone. Compatibility is something to keep in mind, however, whether using petroleum oils or synthetics. It is usually best to use the same oil for topping off that you have been running in the engine. That is, it is preferable to not mix your oils, even if it is Valvoline or Quaker State you are using. The reason is this: the functions of additives blended for specific characteristics can be offset when oils with different additive packages are put together. For optimal performance, it is better to use the same oil throughout.
Myth #5: Synthetic lubricants are not readily available.
Untrue. This may have been the case two decades ago when AMSOIL and Mobil 1 were the only real choices, but today nearly every major oil company has added a synthetic product to their lines. This in itself is a testament to the value synthetics offer.
Myth #6: Synthetic lubricants produce sludge.
Untrue. In point of fact, synthetic motor oils are more sludge resistant than their petroleum counterparts, resisting the effects of high temperature and oxidation. In the presence of high temperatures, two things happen. First, an oil’s lighter ingredients boil off, making the oil thicker. Second, many of the complex chemicals found naturally in petroleum basestocks begin to react with each other, forming sludges, gums and varnishes. One result is a loss of fluidity at low temperatures, slowing the timely flow of oil to the engine for vital component protection. Further negative effects of thickened oil include the restriction of oil flow into critical areas, greater wear and loss of fuel economy.
Because of their higher flash points, and their ability to withstand evaporation loss and oxidation, synthetics are much more resistant to sludge development.
Two other causes of sludge — ingested dirt and water dilution — can be a problem in any kind of oil, whether petroleum or synthetic. These are problems with the air filtration system and the cooling system respectively, not the oil.
Myth #7: Synthetics can’t be used with catalytic converters or oxygen sensors.
Untrue. There is no difference between synthetic and petroleum oils in regards to these components. Both synthetic and petroleum motor oils are similar compounds and neither is damaging to catalytic converters or oxygen sensors.
Myth#8: Synthetics void warranties.
Untrue. No major manufacturer of automobiles specifically bans the use of synthetic lubricants. In point of fact, increasing numbers of high performance cars are arriving on showroom floors with synthetic motor oils as factory fill. New vehicle warranties are based upon the use of oils meeting specific API Service Classifications (for example, SG/CE). Synthetic lubricants which meet current API Service requirements are perfectly suited for use in any vehicle without affecting the validity of the new car warranty. In point of fact, in the twenty-five years that AMSOIL Synthetic Lubricants have been used in extended service situations, over billions of miles of actual driving, these oils have not been faulted once for voiding an automaker’s warranty.
Myth #9: Synthetics last forever.
Untrue. Although some experts feel that synthetic basestocks themselves can be used forever, it is well known that eventually the additives will falter and cause the oil to require changing. Moisture, fuel dilution and acids (the by-products of combustion) tend to use up additives in an oil, allowing degradation to occur. However, by “topping off”, additives can be replenished. Through good filtration and periodic oil analysis, synthetic engine oils protect an engine for lengths of time far beyond the capability of non-synthetics.
Myth #10: Synthetics are too expensive.
Untrue. Tests and experience have proven that synthetics can greatly extend drain intervals, provide better fuel economy, reduce engine wear and enable vehicles to operate with greater reliability. All these elements combine to make synthetic engine oils more economical than conventional non-synthetics. In Europe, synthetics have enjoyed increasing acceptance as car buyers look first to performance and long term value rather than initial price. As more sophisticated technology places greater demands on today’s motor oils, we will no doubt see an increasing re-evaluation of oil buying habits in this country as well.
Conclusion
Since their inception, manufacturers of synthetic motor oils have sought to educate the public about the facts regarding synthetics, and the need for consumers to make their lubrication purchasing decisions based on quality rather than price. As was the case with microwave ovens or electric lights, a highly technological improvement must often overcome a fair amount of public skepticism and consumer inertia before it is embraced by the general population. But the word is getting out as a growing number of motorists worldwide experience the benefits of synthetic lubrication. The wave of the future, in auto lubes, is well under way.
After 409,000 miles without an oil change, the AMSOIL-protected Mack E7-400 engine in this truck was as wear-free as an engine in comparable service treated to TWENTY TIMES the oil changes.
COLONIAL HEIGHTS, VIRGINIA I didnt see any surprises in there at all. Based on my experience with AMSOIL Motor Oil, it came out the way we expected, said owner/ operator Haywood Gray (right) of his 1990 Mack E7-400 engine. It came out in good shape, exactly what youd expect for a well-maintained engine with 630,000 miles. Yet the engines oil had not been changed for 409,000 miles!
Gray began using AMSOIL Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil (AME) in the E9-400 V-8 engine of his first truck, a 1984 Mack, after the engine accumulated 45,000 miles. For 280,000 miles, Gray changed his oil at 40,000-to 60,000-mile intervals though his oil analysis reports showed, without exception, that the oil was good for continued use. At 325,000 miles, Gray increased his oil drain interval to 100,000 miles. The engine was torn down at 600,000 miles when Gray decided to sell the truck. The cylinder liners, bearings, pistons, rings and oil pump, all treated to extended oil drain intervals with AMSOIL, were found to be in excellent condition. Gray continued using AMSOIL AME in the engine of his new truck, a 1990 Mack with a E7-400 engine. With the new truck, instead of using 100,000 mile drain intervals, Gray began basing his oil drains on the findings of a used oil analysis program. He also installed an AMSOIL By-Pass Oil Filter. After 630,000 miles total and 409,000 miles without an oil change, the E7-400 engine was torn down by the local Mack dealership in December 1996 and its parts were examined by an engine rater from a major oil additive manufacturer.
Findings
The engine showed light to moderate wear throughout, just as an engine in similar service and lubricated with conventional oil changed at 15,000- to 20,000-mile intervals would show. In fact, according to the engine rater the parts he examined cylinder liners, pistons, rings, bearings, valve train components could have been put right back in the engine and would have continued to provide the good, dependable service they had provided all along after 409,000 miles without an oil change!
Discussion
Many factors enable AMSOIL to be safely used 20 times longer than petroleum oils may be used:
Stability AMSOIL Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil is far less prone to thermal and oxidative breakdown than are petroleum oils. Stability inhibits the formation of carbon deposits, varnish, sludge and acids, which helps the engine run clean and protected.
Neutralization ability While rapid TBN loss often renders conventional oils unfit for continued use, 12 Total Base Number (TBN) AMSOIL Synthetic Heavy-Duty Diesel and Marine15W-40 Motor Oil offers lasting protection against engine corrosion.
Viscosity retention Some conventional oils viscosity slips out of specification within a few thousand miles of an oil change. AMSOIL Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil neither loses viscosity as shear-prone oils do, which promotes wear during high temperature operations, nor gains viscosity as oxidation-prone oils do, which promotes wear during startup and cold temperature operations.
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| The pins show no wear at all. The piston crowns and lands show a normal amount of carbon. The skirts are very clean with a few fine vertical lines. Independent engine rater |
The rings are very, very good. All the rings are free. None are broken. No plugging whatsoever in the oil rings. Independent engine rater |
Probably 95 percent of the crosshatching is still in the liners. No scuffing, no cavitation in the liners. The liners could go back in the condition theyre in. Independent engine rater |
Additional Demonstrations
Grays successful use of AMSOIL synthetic motor oil in extended drain service is not unique. AMSOIL has conducted demonstrations with fleets all over North America. In each instance AMSOIL has been proven safe and effective in extended drain use. In fact, these studies show that AMSOIL used in extended drain interval programs consistently delivers lower rates of engine wear than conventional oils used in conventional drain interval programs.
The rater found the valve train components showed, very light wear. Very good. [I] find no wear on the shaft, which can be a heavily loaded area.
Southern over-the-road fleet AMSOIL was used in Cummins class 8 engines for 75,000-mile drain intervals; the fleets normal drain intervals were 15,000 miles.
Upper midwest grocery fleet AMSOIL was used in Cummins NTC 350 engines for 74,000-mile drain intervals; normal drain intervals were 12,000 miles.
Northern grocery fleet AMSOIL was used in Detroit Diesel Series 60 engines for 79,000-mile drain intervals; normal drain intervals were 20,000 miles.
Virginia Beach, Virginia owner/operator AMSOIL was used in Cummins 350 engine for 325,350 miles without a drain.
Midwestern trucking fleet AMSOIL was used in Detroit Diesel Series 60 engines for 60,000-mile drain intervals; normal drain intervals were 20,000 miles.
Northern tier over-the-road fleet In an ongoing demonstration, AMSOIL Series 3000 5W-30 is being used in a fleet of Cummins N-14 engines for extended drain service with oil drains based on the findings of used oil analysis. One change was performed at one year with 125,000 miles on the AMSOIL. The oil was recommended for continued use. Normal oil drains are done at 20,000 miles.
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| Again, very, very light wear. These could be put right back in and used again. In an extended drain program [with petroleum oil] theres a possibility you could see maybe half again as much wear.Independent engine rater | Light wear. They compare to [those in] an engine that had 15,000- to 20,000-mile [petroleum] oil and filter changes.Independent engine rater | Minimal wear. These, too, compare to [those in] an engine that had 15,000- to 20,000-mile [petroleum] oil and filter changes.Independent engine rater |
Except for normal top polishing on the push tubes the rater found, no wear to speak of. These can go right back in the engine and be used again. The push tubes were put back into the engine and are in use today.
I see no reason why it [the engine] couldnt run on. Independent engine rater
WHAT MAKES AMSOIL SO GOOD? AMSOIL first put a long-drain synthetic diesel oil on the market in 1975 and since then has introduced three other long-drain synthetic diesel oils. DOES AMSOIL OFFER A WARRANTY? AMSOIL extended drain interval recommendations are set at a minimum of two times or more than the engine manufacturers recommendations as determined by oil analysis. Diesel operators who use AMSOIL for extended drains are fully protected. Studies have proven time and again that extended drain intervals with AMSOIL are a win/win situation truckers win with less downtime and oil expense and they win big with reduced engine wear. |
AMSOIL Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil Aces Test!
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Haywood Gray has his used oil tested regularly to ensure the ongoing serviceability of the oil and well-being of the engine. In the engine oil report card, wear metals tell the whole story. A high wear metal content indicates a high rate of engine wear. In fact, most engine manufacturers publish upper limits on wear metals content at which an oil must be changed to assure continued engine protection. Even after 409,000 miles, AMSOIL protected better than Mack limits required. Now thats protection!
What Is Oil Analysis?
Oil analysis is a maintenance management tool that allows users to monitor equipment condition for maximum equipment life, maximum lubricant drain interval length and optimal downtime scheduling. Oil analysis saves users significant money by reducing equipment replacements and repairs, reducing the volume of lubricant purchased and destined for disposal and, most of all, by reducing downtime.
Oil analysis customers like Haywood Gray trendline their oil analyses. Trendlining involves comparing the results of previous oil analysis reports to those of the most recent report to establish trends in wear metals content, viscosity, acid content, acid neutralization ability and other characteristics as specified. Departures from established trends indicate a change in engine or lubricant condition and the information they provide may be used to correct abnormal conditions before they cause damage or failure.
AMSOIL Oil Analysis
The AMSOIL oil analysis program puts technologically advanced testing equipment in the hands of experienced diagnosticians to deliver accurate, reliable, useful results.
I heard that new cars require a break in period with petroleum before you switch them to synthetic.
Answer: AMSOIL Synthetic Motor Oil can be used during break-in trouble free. In fact, vehicles such as Dodge Viper and Chevrolet Corvette come factory filled with synthetic oil.
Since most new vehicles come filled with petroleum oil, it only makes good sense to change to AMSOIL at the first scheduled oil change interval. New engine components generate high levels of wear metals and can contain contaminants from assembly. By allowing the engine to operate with the petroleum oil until the first oil/filter change interval, the wear metals and contaminants are removed prior to installing AMSOIL.
Will synthetic motor oil clean the sludge from my engine and plug the oil filter and passageways?
Answer: AMSOIL Synthetic Motor Oil can be used during break-in trouble free. In fact, vehicles such as Dodge Viper and Chevrolet Corvette come factory filled with synthetic oil.
Since most new vehicles come filled with petroleum oil, it only makes good sense to change to AMSOIL at the first scheduled oil change interval. New engine components generate high levels of wear metals and can contain contaminants from assembly. By allowing the engine to operate with the petroleum oil until the first oil/filter change interval, the wear metals and contaminants are removed prior to installing AMSOIL.
Is it true that installing AMSOIL or other synthetic oils will cause my engine to leak oil?
Answer: In modern vehicles, there is no risk of AMSOIL motor oil leaking. In fact, AMSOIL motor oil is fully compatible with modern seal materials. It is properly formulated to condition seals, keeping them pliable to prevent leakage.
Is it true that switching to AMSOIL or other synthetic oils will void my warranty?

Tim Samaras
My name is Tim Samaras, and I chase the most powerful storms on the planet. My passion and research is to intercept tornadoes in progress and deploy small probes directly in their path to record the extreme weather conditions inside the tornado core. Last year our team measured the largest barometric pressure drop ever recorded on June 24, 2003 of over 100 millibars as it destroyed the small hamlet of Manchester, South Dakota. The data has revealed several “secrets” of the inside of a violent tornado. I’m also featured in the April 2004 issue of National Geographic magazine, where a photographer was with me during the deployments and has captured some of the most astounding tornado images ever on film.
Every year my pursuit takes me to the great plains where I journey over 35,000 miles over 12 states within a period of two months. Using a petroleum-based motor oil, I used to change my motor oil every couple of days! Based upon these frequent changes, I decided to switch to AMSOIL synthetic motor oil, where I have extended my oil changes to over 7,500 miles! My vehicle has already seen some incredible abuse so far this year with over 15 tornadoes intercepted, where I’ve only had to change the oil three times, as my vehicle has already accumulated over 24,000 miles in May alone!
Tim Samaras

Appeared in National Geographic
*The National Geographic series “Explorer” on the National Geographic Channel aired the new show called “Secrets of the Tornado” on Sunday evening, September 18th. The show featured the research/probe deployment work of AMSOIL sponsored storm chaser Tim Samaras and his colleagues over the past couple of years









