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AMSOIL vs. Mobil 1

409,000-Miles Without An Oil Change

AMSOIL Excels in API Sequence IIIF Performance Test

Motor Oil Performance Tests & Comparisons

Temperature Extremes Call For Superior Motor Oils

Why Harley-Davidson Owners Choose AMSOIL

Synthetic Motorcycle Oil & Harley-Davidson Warranty Issues

AMSOIL Synthetic Gear Lube Outperforms Valvoline Gear Lube

Motor Oil Test and Comparison

8.2% More MPG With AMSOIL Synthetic Lubricants

AMSOIL Proves Superior In Clark County Field Test

AMSOIL Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil is Correct Choice for Jeff Foster Trucking

AMSOIL Products Improve Efficiency and Reduce Operating Costs for Gerlach Trucking

What is the Noack Volatility Test?

What is the Four-Ball Wear Test?

What is TBN?

Frequently Asked Questions

Motor Oils

Motorcycle Oils

Diesel Oils

Racing Oils

2-Cycle Oils

Transmission Fluid

Gear Lubes

Oil Filters

Air Filters

Fuel Additives

Engine Flush

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Frequently Asked Questions About AMSOIL

Q. How long have AMSOIL lubricants been on the market?

A. 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.

Q. What are AMSOIL Synthetic Motor Oils?

A. 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.

Q. Can AMSOIL Motor Oils be used in any engine?

A. 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.

Q. Will AMSOIL Motor Oils void the warranty of a new vehicle?

A. 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.)

Q. Are AMSOIL Motor Oils all-season oils?

A. 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!

Q. Will using AMSOIL Motor Oils increase gas mileage?

A. 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.

Q. Are AMSOIL Motor Oils compatible with other motor oils?

A. Yes. AMSOIL Motor Oils are compatible with all other synthetic or petroleum motor oils.

Q. Why are AMSOIL Motor Oils capable of extended drain intervals?

A. 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.

Q. Will AMSOIL Motor Oils decrease oil consumption?

A. 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.

Q. Is there a recommended procedure for changing to AMSOIL Motor Oils?

A. 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.

Q. Should oil additives or after market products be added to AMSOIL Motor Oils?

A. No, they are not necessary! AMSOIL Motor Oils are properly formulated under the strictest Quality Control procedure to provide superior lubrication performance.

Q. How long should I wait before switching to AMSOIL in my new car?

A. AMSOIL Technical Services recommends operating engines up to the first oil change with petroleum oil for two reasons. First, new engines and engine components generate high wear metals to begin with and generally contain debris from machining and assembly. It is more cost-effective to allow these wear metals to collect in an inexpensive motor oil than to drain an expensive synthetic oil at short intervals. By operating the vehicle to its first drain interval with petroleum oil, these wear metals and manufacturing debris collect in the oil and are then flushed out of the crankcase when drained. This process allows for a much cleaner environment for the AMSOIL synthetic oil to operate in.

The second reason for using the factory fluids would be that within the first miles of operation, if there are any defects in the assembly or workmanship of the engine components, then they may be corrected before installing the more expensive synthetic motor oil. Occasionally, engines may have machined components or materials that are mismatched. These problems will develop in a fairly short period of time. If excessive oil consumption or any other problem, which may point to manufacturing defect, is noted, it should be corrected prior to changing to AMSOIL synthetic motor oil.

However, for racing applications, AMSOIL synthetic motor oil may be installed right away. Race engines are frequently disassembled and rebuilt under more exacting than usual conditions and require the immediate wear protection of a synthetic motor oil. In this instance, extended drains are rare due to contaminants such as fuel dilution and dirt entry. We recommend oil analysis to determine ongoing lubricant serviceability.

Q. Why does AMSOIL say to change the AMSOIL SDF Oil Filter at six months regardless of the mileage? I have only gone 5,000 miles and figure that I could go a whole year without changing it and be good.

A. Once an engine is run with new oil, byproducts of combustion are introduced into the oil. These byproducts are harmful chemicals that continue to degrade the integrity of the motor oil as well as the oil filter media even though the engine may be off. This is why a time limit is published as well as mileage. Short trip driving can be just as detrimental to motor oil and filters as high mileage use, and even more so in some cases. It’s possible that the oil is still intact at the end of the published time limit, but oil analysis would need to verify this. Heavy trucks use this practice regularly, however in small sump capacity engines, the cost of the test is nearly as much as the cost of an oil change.

Q. How can I purchase AMSOIL products?

A. You can order products directly online by clicking on the AMSOIL Online Store link at the top of every page on our website. Or click on Preferred Customer Orders to get info on receiving a discount.


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