Engineering Explained on MSN

How do engine oil systems work

How Does Engine Oil Protect Your Engine? How Does It Work? How Do Engine Lubrication Systems Work - Sponsored By Pennzoil ...
Motoring USA on MSN

8 reasons why your engine oil turns black so fast

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 ...