AMSOIL Synthetic Motor Oils are high performance, extended life oils manufactured from premium synthetic base stocks and special purpose additives. These "designer oils" (so nicknamed because their molecules can be structured to do a specific job) provide significant improved overall performance benefits over conventional petroleum oils. Top

Yes, AMSOIL Motor Oils are compatible with all other synthetic or petroleum motor oils. However, the mixing of AMSOIL with other oils will shorten the effective life of the AMSOIL lubricant. Top

AMSOIL synthetic motor oils are fully compatible with all petroleum motor oils, and there is no danger in mixing the two. Mixing AMSOIL and petroleum oil, however, is not a recommended as a general practice. Performance and long drain intervals will be sacrificed and the oil should be promptly changed, at maximum, within the next 3,000 miles. AMSOIL Synthetic Motor Oil can be used during break-in trouble free.

Synthetic oils are formulated to perform better than petroleum oils at both high and low temperature extremes. That's why every jet engine in the world is uses synthetic oil (and have from day 1). AMSOIL Synthetic Motor Oils have extremely low pour points and flow easily 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.

AMSOIL Synthetic Blend Motor Oils are a blend of synthetic fluids and petroleum oils. They are combined to form an all season motor oil that demonstrates many of the performance features of synthetic lubricants.

It's all in the formulation. Because AMSOIL is made with synthetic basestocks, it resists thermal and oxidative breakdown, which suits it for extended drain use. AMSOIL pairs top-quality long-life synthetic basestocks with top-quality long-life additives. The fact is, other oil companies don't use the quality additives AMSOIL uses because it simply doesn't pay to pair long-life additives with short-lived conventional basestocks.

In engines with over 30,000 to 40,000 miles or in older vehicles, it may be wise to use AMSOIL Engine Flush first. This will ensure that the engine is clean and free of any accumulated dirt or sludge which might have affect on the life of AMSOIL Motor Oils. It is always a good idea to install a new AMSOIL Super Duty Oil Filter (SDF) every time you change oil, in order to receive the maximum benefit of the superior qualities of AMSOIL.

Yes. When used in mechanically sound engines, AMSOIL Motor Oils can reduce oil consumption. However, AMSOIL Motor Oils will not "fix" an engine that has other mechanical problems causing excessive oil consumption.

Regarding used synthetic oils, they can be recycled in the same manner as a petroleum-based motor oils. Synthetic oils can also be used in furnaces designed to burn waste oils.

No. Manufacturers' warranties are based on the use of oils meeting specific API Service Classifications, for example SJ/CF. AMSOIL motor oils meet the current API Service requirements and are perfectly suited for use in any new vehicle without affecting the the new vehicle warranty. Find out more about the Magnusson-Moss Act which was enacted to protect consumers from warranty fraud. Top