We earn commissions from purchases you make using links in our articles. Learn more. Most drivers know that regular oil changes are important for keeping their vehicles performing at their peak, but ...

Every auto parts store in America has a wall of engine and transmission additives that, no matter what's actually in them, promises to fix or rebuild some component or system that needs actual, ...

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 ...