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 ...

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 ...

Ethanol has less energy than gasoline, but it can make so much more horsepower! Ethanol contains less energy than gasoline, ...

We have to separate the chemical "octane" from a fuel's "octane rating" since they can be two different things. Think about it this way. If you learned your shapes in kindergarten, you should easily ...

Car Care is a twice-monthly series offering maintenance best practices and DIY tips for car owners. You’re not alone in thinking that pumping gas has gotten more confusing. With more fuel options than ...