Snake oil. Mouse milk. Whiffle dust. Take your pick — few products have earned such unflattering sobriquets as aftermarket motor-oil additives. And for the very good reason that these promised ...

Analyzing the oil in your vehicle is like sending your blood to the lab for tests. An engine oil analysis can provide clues about the health of your engine – without any invasive surgery. By analyzing ...

It has been said that oil analysis is 85 percent science and 15 percent art. The science part applies to such things as viscosity, the property in fluid that causes it to resist flow. Laboratory tests ...

Diesel engine oil additives are popular add-on layers of protection, but many of their cornerstone benefits are already engineered into base lubricants. Brian Humphrey, OEM technical liaison for Petro ...

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 ...

Given all the options for motor oil options out there, choosing the right oil for your car might seem like a daunting task.

Previously in this two-part examination of oil-drain recommendations and practices: Owner-ops adapt conservative approach to ever-expanding diesel service interval recommendations The most important ...

Synthetic engine oil typically costs 2 to 4 times as much as conventional mineral oil, but it is definitely cheaper than an engine or a vehicle. The US military exclusively uses synthetic oil in all ...