US real-world mileage standard for new vehicles raised to 38mpg in 2031

Biden's rule for 2% fuel-economy increase a year met with disappointment by some environmental groups

New vehicles sold in the US will have to average about 38 miles per gallon (mpg) of gasoline in 2031 in real-world driving, up from about 29mpg this year, under new federal rules unveiled on Friday by the Biden administration.

The final rule will increase fuel economy by 2% a year for model years 2027 to 2031 for passenger cars, while SUVs and other light trucks will increase by 2% a year for model years 2029 to 2031, according to requirements released by the National Highway Traffic Safety Administration.