These engine swaps ruined the character and charm of these classic cars - and there's one reason why.

Although engine oil enters cars as a yellow liquid, you'll almost always find its color to be brown or black when it's being drained. Here's why.

We’ve all been there: you’re staring at a long list of engine treatments and additives […] ...

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The Environmental Protection Agency (EPA) cracked down on lead-based products—including lead paint and leaded gasoline—in the 1970s because of its toxic effects on human health. Scientists at the ...