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.

If you've ever fueled up in Colorado, you might have noticed something unusual about the gas octane ratings at the pump – specifically, the availability of 85-octane gasoline. This lower octane fuel ...

Labeling different gases as “regular” and “premium” is a bit misleading, as many cars only require regular gas and should only run on regular gas. Premium gasoline is not necessarily a luxury product ...

DENVER — When you last filled up your car, do you remember how much it cost? You probably do because it was so high. There is a good chunk of Colorado drivers who could save money right away by ...

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 ...

The answer depends on the age of your vehicleBy Devin PrattYou might have noticed that some gas stations occasionally offer ...

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Many of us will remember the days when you could stop at a gas station, throw in $5 of 87 octane, and hit the road for miles without worry. Those days are over and have been for quite some time, as ...