Fueleconomy.gov - Fuel Economy

To fully understand what fuel economy is, you might first understand how the term is defined. Fuel economy refers to how far a vehicle can travel on a specific amount of fuel. The higher the fuel economy, the less fuel -- gasoline, diesel, whatever -- the vehicle uses. In the U.S., the standard measure of fuel economy is miles per gallon, or mpg.

Basic Information on Fuel Economy Labeling EPA is responsible for providing the fuel economy data that is used on the fuel economy label (or window sticker) on all new cars and light trucks. The data is also used by: The U.S. Department of Energy (DOE) to publish the annual Fuel Economy Guide;

The fuel economy information program in the United States is the oldest and most highly developed of the major vehicle markets.

With increasing fuel price, unpredictable long-term availability of petroleum and greater realization that auto emission is extremely hazardous to both the environment and the public health, fuel economy improvement has become the top priority for the vehicle manufacturers around the world.