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 ...

Oil sludge treatment and recovery remain critical challenges in environmental remediation and resource recovery, due to the hazardous nature of sludge generated in petroleum refining and related ...

Engine oil is the lifeblood of your vehicle. In the harsh environment where numerous metal components inside the engine mesh together dozens of times per second, if the engine oil fails to perform its ...