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

Fuel injectors can get gummed up with dirt and fuel residue over time. Photo credit: David Traver Adolphus / Autoguide.com. Over time and miles, your car might start to slow down. It might not ...

We may receive a commission on purchases made from links. Drivers trying to get the most performance out of their diesel trucks — and there are many things you can do — will sometimes resort to fuel ...

Amsoil's diesel All-in-One fuel additive combines the benefits of Amsoil Diesel Injector Clean, Diesel Cold Flow, and Diesel Cetane Boost in one package. According to the company, the additive ...