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 ...

Over time and miles, your car might start to slow down. It might not accelerate as quickly as it once did; the engine may not run as smoothly as you remember, or the fuel economy may dip—but ...

Dieselcraft’s Technol 246 is a fuel additive that penetrates and dissolves diesel sludge buildups to solve filter plugging problems in diesel fuel tanks. Dieselcraft’s Technol 246 is a fuel additive ...

Filling up a car with gas is second nature for most drivers. But what is not as well known is how dirty a car's fuel system can get over time. If you use low-quality gas without extra fuel additives ...

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

The world of fuel additives is vast, often marketed as offering myriad benefits, from added performance, to engine cleaning, to fuel stabilization. That all said, GM has specific guidance regarding ...