octane fuel contains up to 15 percent ethanol, whereas 89 octane contains only around 10 percent. 88 octane is typically ...

Once the EPA kicked lead out of automotive fuel, gasoline makers settled on a benzene compound as a substitute. But it, too, can cause problems.

Octane fights knock; it doesn’t add power to cars designed for regular. Follow the fuel-door label and pick regular pumps—the detergent is the real upgrade Premium Gas Isn’t Better. It’s Octane vs.

Few drivers may know what octane refers to and how it might affect their vehicles. Metro News Service photo Few drivers may know what octane refers to and how it might affect their vehicles. Metro ...

DENVER — Unless you have a turbocharged engine, regular 85 octane fuel may be the most expensive gas purchase you need. But for more miles per gallon, 87 octane may be the better buy than 91 octane ...

The gas-powered Cummins engine still has tons of torque, and there are some other potential upsides too, including reduced ...