It's not lab test bragging either; the robust performance of AMSOIL's trans fluid was proven during severe-service field testing. To validate the expanded service life recommendations, AMSOIL ...

SUPERIOR, Wis. — AMSOIL Inc. has launched a new formulation of its top-tier Signature Series Synthetic Motor Oil. The AMSOIL Signature Series Synthetic Motor Oil provides 75 percent more engine ...

SUPERIOR, Wis. — AMSOIL Inc. has introduced the AMSOIL Signature Series Ultra-Low Viscosity 100% Synthetic Automatic Transmission Fluid and the AMSOIL Severe Gear 75W-85 Extreme-Pressure Gear Lube for ...

The benefits of using synthetic motor oil versus the use of conventional petroleum motor oil are well known and have been detailed here in 4WHEEL DRIVE MAGAZINE many times before. So why haven't you ...