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 ...

Walk into any parts store and you'll see the rows of glossy bottles promising to stop engine wear, boost fuel economy, and make your old clunker run like it just rolled out of the factory. The auto ...

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 ...

As someone who's driven classic cars daily for around 15 years, as well as working on and restoring such cars throughout my education, I take vintage automotive maintenance very seriously. Many of ...

Additives represent 15 to 20 percent of a gallon of oil with the balance being high-quality base oil. Additive packages play a key role in helping to keep an engine clean and protected from varnish ...

Q: The other day I stopped at a Shell station and found their higher-octane gas contained nitrogen. I believe that information posted about the gas said nitrogen was an additive. All of the concerns ...

It’s a cliché analogy, but oil really is the lifeblood of a vehicle’s powertrain. Without its friction-cutting properties engines would literally grind to a halt, failing in spectacular fashion.