Higher octane fuel is necessary for engines that use higher compression. Low-octane fuels are less compressible and ignite ...

Higher octane fuel resists engine knock under compression — it is not a cleaner or more powerful fuel for all vehicles. Modern knock sensors in post-2000 engines automatically compensate for ...

Gas stations have offered different types of gas for decades. There's a widespread belief that high octane gas can clean your ...

When comparing engine specs for nearly any combustion engine automobile, we see a number of variations available with differing outputs of horsepower and torque. We often have a choice of gasoline or ...

With premium gasoline prices in parts of Michigan pushing toward $6 a gallon, drivers are facing a familiar question with renewed urgency: Is premium gas really necessary — or just an expensive habit?

A computer generated power stroke of an internal combustion engine, following ignition - Pathompong Thongsan/Getty Images When comparing engine specs for nearly any combustion engine automobile, we ...