What Happens If I Use a Thicker Oil in My Engine?
It's best to use the recommended viscosity, but a slightly thinner or thicker oil likely won't cause harm.
Hot AMSOIL Products for Your Hot Rod
AMSOIL makes a full line of products for your hot rod or classic car to help keep it running and...
What Causes Engine Oil Oxidation?
Engine oil oxidation can cause deposits, sludge and other performance problems. Synthetic motor oils offer better oxidation resistance.
What Causes Motor Oil Contamination?
Motor oil contamination is the result of chemical changes to the oil, in addition to the accumulation of dirt, fuel,...
What Are Piston Rings?
Piston rings seal the combustion chamber, keeping combustion gases in and oil out. Properly working piston rings are vital to...
How Much Oil Does My Car Need?
Find out how much motor oil your car needs using the AMSOIL Product Guide. It's fast, free and convenient. Find...
Do Oil Additives Work? What the Testing Shows
Our testing revealed red flags with two leading oil additives. Find out if engine oil additives really work here.
How Start-Stop Engines Challenge Motor Oil
Start-stop cycles in equipped engines can triple compared to traditional engines, increasing the likelihood of bearing wear.
What’s the Best Oil for Turbo Cars?
Industry testing shows that AMSOIL delivers excellent protection for turbo cars, limiting deposits on the turbo bearing and shaft. See...
What Does Motor Oil Do? The 12 Functions of a Lubricant
The primary functions of motor oil are to reduce friction and wear. But it does much more than that.
