There are different gasoline grades based on octane. Here's how to tell which grade of fuel your car needs and why.

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.

We may receive a commission on purchases made from links. Most gas stations have three options that you can put in your vehicle: regular, mid-grade (plus), and premium. These labels are also often ...

2010 Cadillac SRX 2.8T – Click above for high-res image gallery Apparently, under certain circumstances when gasoline with lower than the required 91 octane rating is pumped into the 2010 Cadillac SRX ...