资源介绍
# Content The purpose of EPA’s fuel economy estimates is to provide a reliable basis for comparing vehicles. Most vehicles in the database (other than plug-in hybrids) have three fuel economy estimates: a “city” estimate that represents urban driving, in which a vehicle is started in the morning (after being parked all night) and driven in stop-and-go traffic; a “highway” estimate that represents a mixture of rural and interstate highway driving in a warmed-up vehicle, typical of longer trips in free-flowing traffic; and a “combined” estimate that represents a combination of city driving (55%) and highway driving (45%). Estimates for all vehicles are based on laboratory testing under standardized conditions to allow for fair comparisons. The database provides annual fuel cost estimates, rounded to the nearest $50, for each vehicle. The estimates are based on the assumptions that you travel 15,000 miles per year (55% under city driving conditions and 45% under highway conditions) and that fuel costs $2.33/gallon for regular unleaded gasoline, $2.58/gallon for mid-grade unleaded gasoline, and $2.82/gallon for premium. EPA’s fuel economy values are good estimates of the fuel economy a typical driver will achieve under average driving conditions and provide a good basis to compare one vehicle to another. However, your fuel economy may be slightly higher or lower than EPA’s estimates. Fuel economy varies, sometimes significantly, based on driving conditions, driving style, and other factors. # Acknowledgements Fuel economy data are produced during vehicle testing at the Environmental Protection Agency's National Vehicle and Fuel Emissions Laboratory in Ann Arbor, Michigan, and by vehicle manufacturers with EPA oversight.
