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.

CCJ's 10 44 is brought to you by Chevron Delo, heavy duty diesel engine oil. Now there's even more reasons to choose Delo. An oil sample is only as good as the method used to pull it. You're watching ...

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 ...

Everything, even the smallest of things, can affect the performance of your engine. Whether topping off your fuel tank or driving on motor oil past its expiration date, you're slowly killing your car.

If you own a Cummins-powered vehicle, there's only one name you'll consistently hear when it comes to engine oil: Valvoline Premium Blue. The product is the only engine oil exclusively endorsed and co ...

We may receive a commission on purchases made from links. Turbocharged engines are nothing new — the systems have been around since the late 1800s, first applied to airplane engines and eventually to ...