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 and detergents, your fuel system and injectors can get dirty.

If you thought diesel fuel additives were merely store-bought products at your favorite auto store, you'd better think again. Fuel suppliers, refineries, and manufacturers are the biggest market for ...

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

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 ...

Viewer-submitted questions for The Car Doctor: Q: Would it be beneficial to put the highest-octane fuel in my 2014 Toyota Camry? I know it’s expensive, but I was told to use that and Techron. Will ...

In today’s cost-conscious times, supplementary engine and fuel additives promise means of cutting motoring costs. We study whether or not they really deliver Words: Rob Marshall Ever since the ...

Before we get into this discussion about the best diesel fuel additives, it's important to understand exactly what diesel additives are. During the refining process, diesel fuel receives a rating ...