Learn when premium fuel is actually required, what the different grades mean, and how to avoid paying too much.

The higher the fuel’s octane rating, the less likely it is to prematurely ignite and cause engine knocking. phive2015/Adobe Stock We see the numbers every day at the local gas station, with gas sold ...

Modern Hemi engines, the iconic powerplants from Chrysler, have sparked a debate among owners about their fuel needs. Chrysler recommends a specific octane rating for optimal performance, but does ...

At gas stations around the world, premium 98-octane fuel often sits beside regular 91 or 95-octane options, usually at a ...