Diesel engines are different from gas engines in numerous ways, including their use of high compression ratios. Here's why ...

Pretty simple question actually (or so my ignorant mind thinks): At what compression ratio would an engine benefit from higher octane fuel? The Focus I drive is just over 10:1, and I've heard some say ...

Answer: Octane is a measure of how much compression gasoline can be subjected to before it spontaneously ignites. When gasoline ignites in the cylinder before it is ignited by the spark plug, it ...

Most pickup trucks sold today have internal combustion engines. Passenger vehicles are powered by two main types of engines: compression, aka diesel, and spark ignition, aka gasoline. Besides the type ...

Does your street-driven car ping now when it didn't use to? It may be suffering from octane creep caused by deposit buildup inside the combustion chambers. New engines on the dyno and regularly ...

If you're scratching your head wondering which number gasoline to put in your car, don't overthink it. Just Google the manufacturer's recommendation and run with that. If you're curious about what ...

Raising the octane in gasoline -- seen as a way to improve fuel economy and reduce emissions in today’s high-tech turbocharged, direct-injected engines -- looks like it will get some attention from ...

US regulators have approved the use of a 100-octane unleaded fuel in all spark-ignition aviation engines, a move the general aviation industry says will help its transition away from leaded fuel. The ...

Diesel engines do their hardest work in the toughest jobs, from highway semis to construction equipment, and the reason they ...