Under normal circumstances, most modern engine oil and gasoline brands work fine on their own to keep your engine running smoothly. But there may be cases where even the best of them could use a ...

We earn commissions from purchases you make using links in our articles. Learn more. Most drivers know that regular oil changes are important for keeping their vehicles performing at their peak, but ...

Walk into any parts store and you'll see the rows of glossy bottles promising to stop engine wear, boost fuel economy, and make your old clunker run like it just rolled out of the factory. The auto ...

It doesn't matter if you have a hybrid or conventional gas-powered car, a good motor oil can make the difference between a long-lasting engine and a sputtery ride. Here's what you should look for when ...

We may receive a commission on purchases made from links. Engine oil serves a number of purposes in one's vehicle. It forms a layer of protection on the metal parts of the engine as it warms up while ...

Engine oil turns black from a combination of combustion byproducts, heat oxidation, and detergent additives suspending carbon particles in the fluid. Black oil is not automatically a sign of a problem ...