Taking an engine compression test is sort of like checking your car's blood pressure. It's a quick and painless procedure ...

The compression ratio isn't just a number: it's one of the greatest determining factors in engine building. Compression ratio determines the type of fuel, how much boost, and has a significant ...

The automotive industry continues to be a hotbed of innovation, with activity driven by factors such as auto-ignition properties of the fuel, fuel concentration, and residual rate, and growing ...

Engineers have been trying to perfect variable-compression engines for almost as long as engines have existed. So far, though, only Nissan has succeeded in bringing one to production. Its Variable ...

The following is Dale Pollak's column that ran on his site on April 4. It’s like a leaky faucet. Drip by drip, the retail profit you make on used vehicles goes down the drain. But unlike a leaky ...