Some engines use a spark to ignite their fuel, and others rely on compression. What does all of that mean? And how do the two kinds of engines differ?

Is that knocking sound your engine is making just a case of low-octane fuel, or is it something more serious? The answer is crucial for your engine's health.

Not all braking systems on semis have to be loud to be effective. Exhaust brakes make a fraction of the noise that compression brakes do, here's how they work.

The majority of modern cars run on a combustion engine, patented way back in 1876. Here are the different types of combustion engines and how each one works.

With the 5.7-liter LS engine test complete, we removed the LS and replaced it with our iron-headed 355ci small-block Chevy.