Walk into any auto parts store and you'll see shelves of little bottles promising big […] ...

John Paul, AAA Northeast's Car Doctor, answers a question from a reader curious about using Marvel Mystery Oil. AP Photo/David Zalubowski ...

Walk into any auto parts store and you'll see a wall of little bottles promising […] ...

Your street machine is an endless source of pride, and by driving it every day, you revel in the fact that it's more than just a "show queen." But after a few miles, you detect a deterioration in its ...

Having fuel injectors on all mass-produced vehicles is one of the biggest automotive breakthroughs of the past few decades. If you've ever gone through having to start an engine with a poorly tuned ...