4 Seasons Oils

Vacaville, CA

100% Veteran Owned Business

Authorized Dealer

AMSOIL 5-30 Signature Series wins when tested against 17 other brands

This is a great video initiated by an independent person interested in finding out how 17 synthetic oils performed.  Amsoil did not sponsor this comparison. Testing of all the oils was done by an independent lab for factors like the ability to flow in cold weather, evaporation, and wear.  There are a lot of good motor oils out there, but based on the results of these tests, Amsoil came in first!