How Often Should I Change Front or Rear Differential Fluid?

How often to change differential fluid increases if you tow.

How often to change differential fluid depends on your vehicle, driving conditions and differential fluid quality. Learn more here.



What is the Best Transmission Fluid?

Pouring AMSOIL ATF into truck.

AMSOIL Signature Series Synthetic ATF excels at fighting heat and protecting gears and clutch plates, as demonstrated in severe testing.



Is it Safe to Add 2-Stroke Oil to My Diesel Fuel?

2-stroke oil in diesel pickup

In general, it’s OK to add 2 stroke oil to diesel fuel for extra lubricity, but it’s far easier and more effective to use a fuel additive.



Hot AMSOIL Products for Your Hot Rod

Mark Moriarity Collection - Classic Car

AMSOIL makes a full line of products for your hot rod or classic car to help keep it running and looking great. Here’s a rundown.



What is Transmission Fluid?

Ford Mustang on the road with an "Easy-Pack" of AMSOIL Automatic Transmission Fluid

Transmission fluid is a lubricant formulated to protect your vehicle’s transmission gears and clutch packs while enabling smooth, crisp shifts.



What’s the Difference Between Motorcycle, Dirt Bike and ATV Oil?

Differences between motorcycle, ATV/UTV and dirt bike oil.

Motorcycles, ATVs/UTVs and dirt bikes present different challenges to motor oil, making it tough for one formulation to deliver optimum performance in all applications. It’s best to use an oil made specifically for the application.



How to Prevent Diesel Fuel From Gelling

Prevent diesel fuel gelling

Diesel fuel gelling and frozen diesel can clog the fuel filter and leave you stranded. Learn why this happens and what to do to prevent it.