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 ...

We may receive a commission on purchases made from links. The engine bay under the hood is one of the dirtiest parts of a daily-driven car. But it's also one of the most neglected places to clean.

Even if you regularly clean the interior and exterior of your vehicle, there is a good chance that you do not clean your engine. Many people don’t attempt to clean their engine bay because the dirt ...