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 ...

DENVER — Unless you have a turbocharged engine, regular 85 octane fuel may be the most expensive gas purchase you need. But for more miles per gallon, 87 octane may be the better buy than 91 octane ...

I recently replaced my wife's 2012 Mercedes-Benz E350 4Matic wagon with a 2016 Volvo V60 Drive-E, a station wagon that impressed me when this magazine had a similar Four Seasons test car in its fleet ...

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 ...

Close shot of gas pump showing unleaded 88 octane gas next to regular 87 octane gas and other grades - Alizada Studios/Shutterstock There's a new type of gasoline at gas stations nationwide. It is ...

View post: Milwaukee’s ‘Easy To Use’ 32-Piece Impact Driver Bit Set Is Now $18 at Amazon Many of us will remember the days when you could stop at a gas station, throw in $5 of 87 octane, and hit the ...