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

With all the different engine and combustion theories being tested at the Engine Masters Challenge, it made us wonder about the fuel these powerplants were gulping down. For the 2015 event, we had ...

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 (KDVR) — Gas pumps in some Western states look a little different than the rest of the country. Most states have the option of choosing octane ratings of 87 (regular), 88–90 (midgrade) and ...

Selecting a grade of gasoline simply because it has a higher octane rating might not be the best choice for your car or your budget. While some vehicles can benefit from premium gas, most drivers can ...

That moment of pure panic hits when you realize you’ve been pumping 87 octane into your luxury sedan for the past two minutes. Your stomach drops like you’ve just bricked your phone’s operating system ...

With the price of regular unleaded gasoline still in the $4-a-gallon range, the comparative price of premium is kind of a bargain at many stations. Really. When the price of regular surged this spring ...

Unless you’ve been living in a cave—or drive an electric car—you know that gas prices have shot up to unprecedented highs, due to multiple factors that have been further exacerbated by the Russian war ...

US regulators have approved the use of a 100-octane unleaded fuel in all spark-ignition aviation engines, a move the general aviation industry says will help its transition away from leaded fuel. The ...

Gas prices in the northwest continue to sit above the national average, according to AAA, as prices nationwide continually increase to new record highs. The average price of regular unleaded gas in ...