Add Yahoo as a preferred source to see more of our stories on Google. Are you overpaying for premium gas or getting suboptimal performance out of your car because you're feeding it the wrong fuel?

A School of Mines professor has tracked his gas purchases since 1989 and prefers 87 octane.

America’s biofuel takes advantage of a plentiful supply of corn-based ethanol, but the reason why it's so inexpensive is a ...

Premium and Top Tier gas sound good, but what’s really best for your car — and your budget? In some cases, these types of fuel are indeed better for your car — but for different reasons. Premium gas, ...

The 2026 Jeep Grand Cherokee’s new 2.0-liter four-cylinder engine may not appear to be a dramatic improvement at first glance. Appreciating it requires digging a little deeper into the specs.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A large variety of fuel options and prices are available - Bill Ragan/Shutterstock Premium gasoline is for cars. More specifically ...

87 octane gasoline, often called "regular" gas, is one of the most commonly used fuels in the United States. But what gives it that 87 rating is a word you've probably heard a time or two: Ethanol.

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 ...