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 ...

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 ...

Synthetic oil used to be something only performance cars needed, but not anymore. Now it’s the manufacturer-recommended engine lubricant in many mainstream vehicles, such as the Subaru Forester ...

Your car’s oil is its lifeblood, and regular oil changes are key to a healthy engine. Here’s what you auto know to keep your ...