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

Renting a car isn't exactly cheap, and adding premium gas adds to the overall cost, but is it necessary? Here's what you need ...

Heed the advice on the cover of the Hitchhiker's Guide to the Galaxy and don't panic, at least not yet. Or, maybe just panic a little on the inside, but maintain your calm demeanor on the outside.