Question:I thoroughly enjoyed the tech article "When Good Cams Go Bad" (June '06), but I have a couple of questions: If you have an older car without a catalytic converter but don't have flat tappets, ...

Engine oil seems so simple. It's slippery. It keeps metal parts from fusing together. It's messy, especially when it has been squeezed, slung, and sprayed around the inside of a hot engine for ...

Dear Doctor: I own a few pre-1970 cars and have heard many stories about these older car engines having camshaft failure from the use of the wrong engine oil. Can you recommend the correct oil?

Motor oil contains chemical additives that extend how long engines can run without failure, but, despite decades of ubiquity, how such additives actually work to prevent this damage have remained a ...

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 ...

Of all the advanced technologies that have impacted the automobile, some of the most significant, and perhaps the most seldom recognized, are the advancements in lubricants. And while modern engines, ...

Snake oil. Mouse milk. Whiffle dust. Take your pick — few products have earned such unflattering sobriquets as aftermarket motor-oil additives. And for the very good reason that these promised ...