88 octane fuel has been making the rounds recently. But just how much does it matter compared to the usual 87 octane fuel ...

If you're looking to save money at the gas pump but still want a luxury vehicle, these are the models that can run on regular ...

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 ...

Should you use unleaded 88 octane gas (also known as E15), which contains 15 percent ethanol, instead of standard 87 octane ...