Let’s explain all of those confusing numbers, letters and terms to help you choose the right oil for your car.

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 ...

With so many options, choosing the right motor oil can be bewildering. We cut through the confusion to help you make the best ...

Motor oil is one of those utilitarian products that ... User feedback and professional reviews were taken into account.

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 ...

In May of 2011, we ran a story about a small company seeking backers for an innovative do-it-yourself device engineered to measure the level of contaminants in a vehicle's motor oil. Armed with ...

One way to do that is by using a low viscosity oil. The less energy an engine uses to lubricate itself, the less gas it uses in the process. There's also the fact that as engine technologies and ...