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 ...

March 14, 2009 – We get a lot of press releases and most of them go directly to the bitslag bucket, but this one seems interesting, so take a look and let us know what you think. UPDATE: New Test: ...

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 ...

Under normal circumstances, most modern engine oil and gasoline brands work fine on their own to keep your engine running smoothly. But there may be cases where even the best of them could use a ...

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 ...

If you wonder about the purpose of all the chemical additives blended into truck engine oils—especially the new PC-11 formulations coming to market this December—it helps to think about barbecue sauce ...

We earn commissions from purchases you make using links in our articles. Learn more. Most drivers know that regular oil changes are necessary to maintain the life and performance of their vehicle. For ...