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

Gas stations are well integrated into our daily lives as Americans. Except for residents of NJ, where you don't have to pump your own, a gas station can be intimidating with its cryptic displays and a ...

We’ve been burning gasoline for well over a hundred years now, but some misconceptions about fuel—especially when it comes to octane—are so ingrained in the popular consciousness that even those of us ...

Gasoline is a mystery to most hot rodders. For the most part, we just fill up the tank and forget about the fuel. The most difficult question is whether to step up from 89 to 92 octane. As you might ...

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 ...

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.

Customers who bought premium gasoline from Los Angeles-area Mobil stations in recent months may have gotten a little less oomph in their tanks than usual. Government inspectors are investigating ...

Two steps forward make no progress on a treadmill stuck in reverse. Still, US Reps. Bill Flores (R-Tex.) and John Shimkus (R-Ill.) deserve credit for recognizing that the Renewable Fuel Standards (RFS ...

Like many Coloradans, Forrest Yang drives a Subaru. A Subaru Forester, to be precise. “Don’t read too much into that with my name and the car’s name,” he told CPR News. “It is what it is.” Yang lives ...

Combustion chamber deposits accumulate in a new gasoline engine and can result in an octane requirement increase (ORI) of as much as 8 to 10 octane numbers. In some cases, a higher octane fuel is ...