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Frequently Asked Questions

Will AMSOIL Motor Oils void the warranty of a new vehicle?
Absolutely not! Manufacturers. warranties are based upon the use of oils meeting specific API Service Classifications, for example, SJ/CF. (AMSOIL lubricants meet the current API Service requirements and, thus, are perfectly suited for use in any new vehicle without affecting the validity of the new vehicle warranty.)

How do AMSOIL products compare with other synthetic lubricants?
We do have four ball wear charts and Noack charts comparing AMSOIL with other synthetics. We feel these are two areas that can be compared that will affect the performance of the products in a way that can be explained to consumers. Most synthetics have similarly good typical specs, but the performance from better additives, more shear stable VI, higher TBN, etc, can not be easily demonstrated with a test or a chart. These attributes of AMSOIL show up by controlling acids in the oil, eliminating corrosion in the engine, maintaining viscosity throughout the drain interval helping improve performance in the areas of fuel economy and cold weather starting, keeping contaminants in suspension until they get to the oil filter for removal or the oil is drained, and generally keeping the engine cleaner and deposit free. These benefits are not easily demonstrated with a test or a chart. They are only noticeable in actual use. As we find areas where comparisons can be made to demonstrate differences between AMSOIL and other synthetics, we will do them. In the meantime, it is testimonials from dealers like yourself and customers that provide the best credible evidence that our products are formulated to perform.

How long have AMSOIL lubricants been on the market?
AMSOIL introduced the first synthetic motor oil with an API (American Petroleum Institute) Service Classification in 1972. Since that time, AMSOIL has varied and expanded its product line.

What are AMSOIL Synthetic Motor Oils?
AMSOIL Synthetic Lubricants are fuel efficient, extended life lubricants manufactured from select synthetic base stocks and special purpose additives. These lubricants provide improved overall performance characteristics when compared to conventional petroleum oils.

Can AMSOIL Motor Oils be used in any engine?
Certainly, AMSOIL Motor Oils may be used in any mechanically sound gasoline or diesel fueled engine. Basically, that means they are excellent for use in any vehicle's engine.

Are AMSOIL Motor Oils All-Season Oils?
Synthetic oils are made to protect and perform better than petroleum oils at both high and low temperature extremes. That's why every jet engine in the world is lubricated with synthetic oil. AMSOIL Motor Oils have extremely low pour points and flow readily at extremely low temperatures for easier winter starting and significantly reduced engine wear. At high temperatures, no conventional motor oil can compare to the overall protection AMSOIL Synthetic Motor Oils provide. That's extremely important for today's turbocharged and small, non-turbocharged engines!

Will using AMSOIL Motor Oils increase gas mileage?
Tighter government regulations and increases in engine manufacturers. demands are calling for more fuel efficient lubricants. AMSOIL Motor Oils reduce friction and drag better than petroleum oils, resulting in significant fuel economy increases. In a recent 1.2 million mile demonstration, AMSOIL Lubricants showed a 4.5% increase in gas mileage. Other tests have shown increases of as much as 15% under certain weather and driving conditions. Yet, because every vehicle is different, as are driving habits and conditions, it is difficult to accurately project an exact increase.

Are AMSOIL Motor Oils compatible with other motor oils?
Yes. AMSOIL Motor Oils are compatible with all other synthetic or petroleum motor oils but not recommended ( having petroleum motor oil mixed in detracts from the superior performance of AMSOIL) but there is no danger in doing so.

Why are AMSOIL Motor Oils capable of extended drain intervals?
AMSOIL Synthetic Motor Oils are highly resistant to the destructive effects of heat, and do not break down like petroleum oils. This means that AMSOIL Motor Oils can provide much longer drain intervals than conventional lubricants.

Will AMSOIL Motor Oils decrease oil consumption?
Yes. When used in mechanically sound engines, AMSOIL Motor Oils can reduce oil consumption. Under test conditions, a reduction of as much as 42% was demonstrated for prolonged periods. However, this should not be taken to mean that AMSOIL Motor Oils are .cure-alls. for engines that consume oil because of mechanical problems.

Is there a recommended procedure for changing to AMSOIL Motor Oils?
There are no special requirements; however, in older vehicles or those with high mileage, it may be advisable to use AMSOIL Engine Flush first. This will ensure that the engine is clean and free of any accumulated contaminants which might have an effect on the service life of AMSOIL Motor Oils. In all cases, it is good judgment to install a new AMSOIL Super Duty Full-Flow Oil Filter (SDF) every time you change oil.

Should Oil Additives or After Market Products be added to AMSOIL Motor Oils?
No, they are not necessary! AMSOIL Motor Oils are properly formulated under the strictest Quality Control procedure to provide superior lubrication performance.

I sometimes hear "Synthetic oils contain detergents that can make the oil seals leak in older cars." Is this really an issue? How old would a car have to be to not use synthetics?
Synthetic lubricants do have an inherent detergency that cleans and removes conventional motor oil deposits left over in an engine. However, motor oils are designed to help swell seals slightly to prevent leakage. The only time you would observe seal leakage is if the seals are already damaged or showing signs of leakage around them. As long as the vehicle has been well maintained, and in good mechanical condition, it can be switched to a synthetic lubricant at any mileage.

Will my warranty be void if I don't change my oil every 3,000 miles?
NO, To affect the vehicle warranty, the lubricant must be directly responsible for the failure. If the oil did not cause the problem the warranty cannot be voided, regardless of the brand of oil used, or the length of time or number of miles the oil was used. To flatly inform the customer that the use of AMSOIL synthetic motor oil voids their vehicle warranty is not true. It is not supported by OEMs and damages AMSOIL INC. AMSOIL INC carries liability insurance and offers our customers complete warranty coverage for oil related failures, should one ever occur.

I should I change my oil when it gets dark, right?
This is absolutely NOT TRUE. The color of an oil does not have any bearing on its lubrication ability. Most oil and especially diesel engine oil will turn black in the first few hours of operation due to contaminates generated by the combustion process and soot particles. The ONLY way to accurately determine an oil's lubricating value or contamination level is through (spectrographic) oil analysis. The useful life of an engine oil is dependent on several factors such as the quality of the oil, type of fuel, equipment condition, type and operating environment of the equipment and, most important, the type of filtration used. The filtration system and the oil are vital tools for preserving engine life.

Will my oil pressure or idle rpm change when I switch to AMSOIL?
They might. AMSOIL has a better friction reducer than conventional oil and friction directly affects oil pressure and idle speed. Since synthetic oils don't have to "push" as hard to overcome friction as conventional oils do, the oil pressure drops. The engine still has adequate circulation and protection it just doesn't have to work as hard.

How long has AMSOIL been around?
AMSOIL was founded in 1972 with the introduction of the first 100% synthetic motor oil to gain an American Petroleum Institute performance rating and has led the industry ever since in the development of synthetic lubricants.