What Motor Oil is Best for Winter? (And Other Cold-Weather Questions)

Car driving in snow during winter

Synthetics are a better choice when looking for a winter motor oil. They remain fluid in cold weather to ease cold starts and improve wear protection.



2022 AMSOIL Championship Snocross Season Gears Up

The 2022 AMSOIL Championship Snocross season features eight race weekends at venues around the Midwest. Check out the schedule here.



Do Older Engines Need Oil With ZDDP Additives?

Using a high-zinc oil with a high dose of ZDDP additives helps protect classic car and hot rod engines. AMSOIL Z-ROD® Synthetic Oil contains 1,400 ppm zinc.



What’s the Best Differential Fluid?

Best differential fluid

Today’s vehicles produce more power and torque than ever. So, what’s the best differential fluid for protecting against wear and deposits?



GM dexos1 Gen 3 Raises Motor Oil Performance Standards

GM dexos1 Gen 3 is designed to address the challenges of smaller, higher-powered engines. AMSOIL synthetic motor oils already outperform it.



How to Clean Snowmobile Power Valves

How to clean snowmobile power valves

Deposits can cause exhaust power valves to stick, reducing power and performance. Here’s how to clean snowmobile power valves.



How Engine Sludge Forms. And How To Prevent It.

Engine sludge is a black gelatinous substance that wreaks havoc in engines. Fighting sludge in oil means using a good synthetic motor oil.