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.

We may receive a commission on purchases made from links. When it comes to cleaning, that screaming engine under the hood deserves the same level of care as the rest of your car. Your car's motor and ...

Beneath your hood lies a vast array of pipes, hoses, turbochargers, intercoolers, radiators, wires, fuses, intakes, and other engine components. Although you’d think a closed hood would protect the ...

Carbon deposits are a normal occurrence in an engine, but can build up over time, causing problems. Essentially, heat, pressure, and oxidation can transform unburned fuel into a black soot-like ...

CARS.COM — A clean engine compartment makes a used car look newer and better maintained. Some shops that perform engine cleaning services claim a clean engine even runs a little cooler because ...

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 ...