Fuel economy is about maximizing the number of miles your vehicle can travel on a gallon of fuel. The cost of fuel has a major impact on fuel economy. Check out these great fuel economy articles from HowStuffWorks.
How MPGe Works
If you're trying to choose between an all-electric or hybrid car and a conventional, internal combustion-powered ride, how can you tell which one is the most efficient? MPGe is the answer.