Gas Mileage Calculations: Why MPG Numbers Really Matter

Gas mileage calculations have recently changed to more accurately reflect real-world mpg. Here’s what you need to know about the new math and how to improve your mpg, save money and reduce air pollution.

Monitoring your fuel economy and becoming more aware of what influences it is one of the easiest and most fulfilling ways to make a difference for the environment.
Monitoring your fuel economy and becoming more aware of what influences it is one of the easiest and most fulfilling ways to make a difference for the environment. 
Illustration by Istockphoto/Ryan Burke