Revisions and Additions to Motor Vehicle Fuel Economy Label
The final rule requires a revised fuel economy and environment label from model year 2013. It adds fuel consumption, shown as gallons per 100 miles for combined city and highway driving on liquid-fuel vehicles, with less prominence than the familiar miles per gallon figure, and uses the unit each fuel is sold in for other fuels. The rule discusses the MPG illusion, the non-linear relationship by which a given gain in miles per gallon saves different amounts of fuel depending on the starting efficiency, and cites it as a reason for adding the consumption metric.
The final rule requires a revised fuel economy and environment label from model year 2013. It adds fuel consumption, shown as gallons per 100 miles for combined city and highway driving on liquid-fuel vehicles, with less prominence than the familiar miles per gallon figure, and uses the unit each fuel is sold in for other fuels. The rule discusses the MPG illusion, the non-linear relationship by which a given gain in miles per gallon saves different amounts of fuel depending on the starting efficiency, and cites it as a reason for adding the consumption metric.
Written from the federal Register final rule of 6 July 2011, first part read 2026-10-27.
What our sources record
Recorded when this source was checked, figures included, with page references and quotation marks removed.
76 FR 39477. federalregister.gov/documents/2011/07/06/2011-14291/revisions-and-additions-to-motor-vehicle-fuel-economy-label