What Does Motor Oil Do?

What does motor oil do?

The primary functions of motor oil are to reduce wear and friction. But motor oil must do more than that for your engine to run well and last as designed.



What’s the Best Synthetic Motor Oil?

Signature Series oil change

Want the best synthetic oil for your engine? Many oil companies say they have the best, but we offer the scientific data to back it up.



Racing Oil vs. Regular Oil: What’s the Difference?

Some enthusiasts use racing oil in their car or truck. But your vehicle needs an oil that provides benefits racing oils aren’t designed to deliver.



The DIY Oil Change: Avoid These 5 Common Mistakes

Many motorists still love the DIY oil change. If you change your own oil, avoid these five common mistakes to ensure your vehicle performs well.



Can I Use Diesel Oil in My Gas Engine?

You can use diesel oil in a gas engine provided the diesel oil meets the appropriate specifications and viscosity requirements of your engine.



The Pros and Cons of Semi-Synthetic Oils and Synthetic Blends

How to check oil properly

Generally speaking, synthetic blends and semi-synthetic refer to the same thing: an oil that uses a combination of conventional and synthetic base oils in its formulation.



Why Does Motor Oil Turn Black?

Oil change

Find out why motor oil turns black and how that may affect your engine and, more importantly, if it signals the time for an oil change.



How to Pick the Right Motor Oil for Your Car

conventional and synthetic oil

The glut of motor oils available can quickly induce analysis paralysis. How do you pick the right motor oil for your car?



What is the Shelf Life of AMSOIL Synthetic Lubricants?

Pouring oil

AMSOIL synthetic lubricants are designed to retain their original performance after a reasonable period of time in your garage or storeroom. Proper storage ensures the freshest, most effective products possible.



How Much Oil Does My Car Need?

The answer seems simple: probably about five quarts. But, if you drive a small car with a four-cylinder engine, it’s likely closer to four quarts. However, the V-8 engine in your truck could require about seven quarts. My in-laws’ RAM diesel pickup takes 12 quarts of motor oil.