Should I Use a Lighter Winter Oil Weight?
Using a lighter winter oil weight when the temperature drops can improve cold starts and maximize wear protection at startup.
Synthetic Blend vs. Full Synthetic Oil: Pros and Cons
Synthetic blends and semi-synthetics both use a combination of conventional and synthetic base oils.
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...
Which Car Oil is Right for my Vehicle?
When deciding which oil to use in your car, ensure you use the correct viscosity of oil that meets the...
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.
