The Trump administration released new fuel economy standards on Monday, relaxing regulatory requirements for automakers to control pollution from gasoline-powered cars and light trucks. The new standards set the industry fleetwide average for light-duty vehicles at roughly 34.9 miles per gallon in the 2031 model year, down from a projected 50.4 miles per gallon in 2031 under rules put in place by the Biden administration. President Donald Trump claimed on his Truth Social media account Saturday that the less stringent mileage requirements would save Americans thousands of dollars on a new car.