The Obama administration issued the final version of new rules that require automakers to nearly double the average fuel economy of new cars and trucks by 2025.
Current rules for the Corporate Average Fuel Economy, or CAFE, program mandate an average of about 29 miles per gallon, with gradual increases to 35.5 m.p.g. by 2016.
The administration called the new rules "historic," and estimated that Americans would reduce their oil consumption by 12 billion barrels over the course of the program. "These fuel standards represent the single most important step we've ever taken to reduce our dependence on foreign oil," Mr. Obama said in a statement.