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Trump administration relaxes fuel economy standards to about 34.9 mpg for 2031 models
The Transportation Department and NHTSA released final fuel economy standards on September 28, cutting the 2031 fleetwide average to about 34.9 mpg from 50.4 mpg under Biden-era rules. Environmental groups plan to challenge the move in court.
Why it matters
The Trump administration on Monday released new fuel economy standards that relax regulatory requirements for automakers to control pollution from gasoline-powered cars and light trucks. The Transportation Department and the National Highway Traffic Safety Administration estimated the finalized standards would correspond to a combined industry fleetwide average of roughly 34.9 miles per gallon for passenger cars and light trucks in the 2031 model year, down from a projected 50.4 mpg in 2031 under rules put in place by the Biden administration.
What they're saying
Transportation Secretary Sean Duffy said the change ends the "illegal mandate that forced automakers to produce more expensive electric vehicles that American families didn't want." President Trump wrote Saturday on Truth Social that the less stringent requirements would "take the waste out of building cars in America" and save families "thousands on a new, beautiful and safe car." Environmental groups argue weaker standards will increase fuel costs and pollution, and the Sierra Club said it plans to challenge the move in court.
Context
Since taking office, Trump has relaxed tailpipe emissions rules, repealed fines for automakers missing federal mileage standards, and terminated consumer EV tax credits of up to $7,500. The Transportation Department estimates new-vehicle prices will fall by about $930 per vehicle, while fuel consumption through 2050 is projected to rise by roughly 100 billion gallons, fuel costs by $185 billion, and carbon dioxide emissions by about 5%.
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