U.S. Department of Energy Energy Efficiency and Renewable Energy
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Spotlight on Fuel Economy

Chart showing that in general fuel economy decreases as speed increases over 50 mph

Clean Cities Top 20 Facts

#7 Small changes can make a big impact


August 9, 2013

Vehicle Emissions and Fuel Economy Standards

Photo of an idle-reduction sign

What are the federal emissions and fuel economy standards for current and future on-road vehicles?


April 1, 2013

Testing and Improving Vehicle Fuel Economy

Photo of a car dashboard

How are vehicle fuel economy ratings determined? What factors impact fuel economy?


December 1, 2012