Motor oil comes in a variety of forms, designated by pairs of numbers, but the most common two are 10W-30 and 10W-40. What's the difference between them?

Vitol CEO Russell Hardy said on Monday that he expects global oil prices to move in a lower range than over the past three to ...

If you've ever examined the packaging on your engine oil, you may have noticed a letter C among all the other information.

There's a lot of information on the packaging for your engine's motor oil, but the S designation may be one of the most ...

Basically, modern cars use lighter, lower-viscosity oils because they can. Because engine technology and petrochemical ...