Every vehicle reaches its optimal fuel economy at a different speed, but gas mileage usually decreases quite rapidly at speeds above 60 mph. In fact, you can assume that each 5 mph you drive over 60 mph is like paying an additional $0.24 per gallon for gas! And, let's face it, observing the speed limit is also safer, too!
by TheStig on January 04 2009
Empty the Junk from the Trunk
The less weight in your car, the better the gas mileage. Do ...
by cpatch