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

Fuel comes in different grades based on octane level at gas stations. Only some performance engines require Premium fuel for the best power output, fuel efficiency, and engine function. Are you ...

We've all seen octane ratings at the fuel pump, and based on the numbers, it's easy to think the higher number is better. From lowest to highest, the types of gasoline are regular, mid-grade, and ...

John Paul, AAA Northeast's Car Doctor, answers a question from a reader who recently visited a service station offering both 87 and 88 octane gas. The Car Doctor answers a question from a reader who ...

We may receive a commission on purchases made from links. Most gas stations have three options that you can put in your vehicle: regular, mid-grade (plus), and premium. These labels are also often ...

Add Yahoo as a preferred source to see more of our stories on Google. Image credit: Wikimedia Dead money flows through gas pumps across America every single day, yet drivers keep paying premium prices ...

The price difference during a fill-up between regular and premium gas can be eye-opening. As of this writing, the U.S. Energy Information Administration reports that the average price for a gallon of ...

Are you overpaying for premium gas or getting suboptimal performance out of your car because you're feeding it the wrong fuel? Gasoline is categorized by octane ratings at gas stations. Most drivers ...