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.

DENVER (KDVR) — Gas prices are fluctuating across the country, and a few states offer a “cheaper” octane option that isn’t found in most places. It has to do with the altitude. Most states have the ...

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 ...

Some vehicles with premium fuel recommendations can run on regular octane gasoline. A hard-to-press brake pedal on startup could indicate a loss of vacuum in the power booster system. Compact, ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DENVER (KDVR) — Gas prices are fluctuating ...

MASON CITY — Gasoline prices will rise next month for Iowa drivers who want to buy 87 octane gas without ethanol. Magellan Midstream Partners of Tulsa, Okla., Iowa’s largest pipeline operator, will no ...