Harley-Davidson makes some of the most popular motorcycles in the U.S. and some of them even have cruise control. Here's how to use it and how to turn it off.

It's important to understand how your car works to avoid wasting unnecessary fuel. Using cruise control can improve your MPG, but only under certain conditions.

Cruise control has the obvious benefit of letting you take your foot off the gas without losing your car's momentum. But does it save gas as well?