One of Sean Duffy’s first acts was to start dismantling rules demanding automakers hit fleet average of 50.4 mpg for cars by 2031

In his first act in office, new Trump Transportation Secretary Sean Duffy signed a memorandum directing the agency to review former President Joe Biden’s fuel economy standards, which aim to reduce vehicle emissions.

The federal government has estimated the average U.S. driver was on track to save over $5500 in gas during the second Trump administration under currently established fuel economy rules — but that's set to change,