Engine oil color reveals its age, contamination level, and operating condition. Fresh oil is amber or light brown. Oil darkened to black but still translucent after a few thousand miles is normal.

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 ...

Hello Paul, I have a 2018 Hyundai with a 1.6 litre petrol engine and a six-speed automatic gearbox. This car has done 40,000 km and is always serviced on time. The oil is checked monthly, and while ...