market including plug-in hybrids, electric vehicles, flexible-fuel vehicles, hydrogen fuel cell vehicle, natural gas vehicles, diesel-powered vehicles, and gasoline-powered vehicles. This ruling uses miles per gallon gasoline equivalent for all fuel and advanced technology vehicles available in the U.S. In a joint ruling issued in May 2011 the National Highway Traffic Safety Administration (NHTSA) and EPA established the new requirements for a fuel economy and environment label that is mandatory for all new passenger cars and trucks starting with model year 2013. are required to have this label showing the EPA's estimate of fuel economy of the vehicle. All new cars and light-duty trucks sold in the U.S. The ratings are based on EPA's formula, in which 33.7 kWh (121 MJ) of electricity is equivalent to one (U.S.) gallon of gasoline, and the energy consumption of each vehicle during EPA's five standard drive cycle tests simulating varying driving conditions. The MPGe metric was introduced in November 2010 by EPA in the Monroney sticker of the Nissan Leaf electric car and the Chevrolet Volt plug-in hybrid. Miles per gallon equivalent cost for alternate fuel can be calculated with a simple conversion to the conventional mph (miles per gallon, miles/gal). MPGe does not necessarily represent an equivalency in the operating costs between alternative fuel vehicles and the MPG rating of internal combustion engine vehicles due to the wide variation in costs for the fuel sources regionally since the EPA assumes prices that represents the national averages. Actual heat engines differ vastly from this assumption. The equivalence of this unit to energy in a gallon of gasoline is true if and only if the heat engine, generating equipment, and power delivery to the car battery are 100% efficient. The unit of energy consumed is deemed to be 33.7 kWh kilowatt-hours without regard to the efficiency of conversion of heat energy into electrical energy, also measured in kilowatt-hours (kWh). MPGe is used by the United States Environmental Protection Agency (EPA) to compare energy consumption of alternative fuel vehicles, plug-in electric vehicles and other advanced technology vehicles with the energy consumption of conventional internal combustion vehicles rated in miles per U.S. Miles per gallon gasoline equivalent ( MPGe or MPG ge) is a measure of the average distance traveled per unit of energy consumed.
The rating for all-electric mode (left) is expressed in miles per gallon gasoline equivalent (mpg). Monroney label showing the EPA's fuel economy equivalent ratings for the 2011 Chevrolet Volt.
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