Trump Slashes Auto Mileage Targets to 35 MPG
The Trump administration finalized rules Monday cutting fleetwide fuel economy targets to 34.9 mpg by 2031, rolling back a 50.4 mpg mandate to save automakers $60.6B in compliance costs. The deregulatory shift dismantles federal pressure toward electric vehicles, eliminating manufacturer credit trading and prompting an immediate lawsuit from environmental coalitions as pump prices rise.
The White House traded automotive electrification for short-term sticker relief — leaving Detroit automakers vulnerable if global markets keep transitioning to battery power without them.
Background Corporate Average Fuel Economy standards were established in 1975 to curb petroleum dependency and push automakers toward cleaner automotive engineering. The Biden administration tightened fleet requirements to accelerate electric vehicle adoption, but domestic automakers pushed back as consumer EV demand slowed and compliance penalties mounted.
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The Department of Transportation lowered the 2031 fleet efficiency target from 50.4 mpg to 34.9 mpg, which officials project will trim new vehicle purchase prices by roughly $1,300.
The rule phases out the CAFE credit trading program by 2028, cutting off a lucrative revenue stream that pure-electric automakers previously used to sell surplus credits to traditional carmakers.
General Motors alone is projected to save $20.4B in engineering costs through 2031, giving Detroit manufacturers breathing room after Stellantis racked up $775M in past noncompliance penalties.
The Sierra Club and allied groups vowed to challenge the rule in federal appeals court, arguing that weaker standards will lock consumers into billions in extra fuel costs amid wartime oil inflation.
Watch Sierra Club's federal court filing in the DC Circuit → if judges grant an emergency stay, automakers face dual production tracks while planning billions in 2028 model-year retooling.
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