United States Eases Vehicle Fuel Economy Targets to Lower Consumer Costs
Washington, Tuesday, 29 September 2026.
The U.S. Department of Transportation finalized rules reducing target fuel efficiency to 34.9 mpg by 2031, aiming to cut average vehicle costs by $1,300 while eliminating electric vehicle credit trading by 2028.
Implementation of New Fuel Efficiency Standards
On 28 September 2026, the U.S. Department of Transportation finalized the “Freedom Means Affordable Cars” initiative, officially resetting the Corporate Average Fuel Economy (CAFE) standards [1]. Transportation Secretary Sean Duffy announced that the new rule establishes a fleet-average fuel economy target of 14.84 km/L (34.9 mpg) by model year 2031, a significant adjustment from the previous 21.43 km/L (50.4 mpg) requirement under the Biden administration [3][5]. This regulatory shift is designed to reduce the average cost of a new vehicle by approximately $1,300, aiming to alleviate financial pressure on consumers amidst changing market dynamics [1]. The Department of Transportation projects that these changes will generate collective savings of $138 billion over a five-year period [3].
Regulatory Timeline and Credit Changes
The National Highway Traffic Safety Administration (NHTSA) will implement specific structural changes to the regulatory framework starting in model year 2028, including the elimination of the CAFE credit trading program [3]. This program previously allowed automakers to trade fuel-efficiency credits, a mechanism critics argued artificially supported the electric vehicle industry at the expense of traditional manufacturers [5]. Furthermore, beginning in model year 2030, the Department of Transportation plans to revise vehicle classification criteria to shift the projected fleet mix from 70% light trucks to 70% passenger cars [1]. These timeline-specific adjustments are intended to restore integrity to the national fuel economy program while providing automakers greater freedom in design and production [1].
Political Context and Industry Reaction
President Donald Trump approved the new fuel economy standards, framing the policy change as a benefit for both automakers and consumers by removing what was described as wasteful regulatory burdens [2]. Transportation Secretary Duffy stated that the administration has ended the “illegal mandate” that forced automakers to produce more expensive electric vehicles that American families did not want [1]. This action fulfills a campaign promise to rescind policies that incentivized electric vehicles, contrasting sharply with the former Biden administration’s stricter policies meant to spur electric vehicle adoption [2]. Major manufacturers, including General Motors, Ford, and Stellantis, had indicated interest in building more vehicles domestically if regulatory conditions were favorable [2].
Safety and Environmental Projections
Regarding safety outcomes, the new rule is projected to prevent 1,900 deaths and over 300,000 serious injuries by accelerating new car sales through reduced vehicle prices [1]. NHTSA Administrator Jonathan Morrison noted that newer cars are safer cars, and reducing vehicle prices enables more American families to afford newer vehicles [1]. In terms of energy consumption, the final rule projects that annual oil consumption in 2050 will be 1.3 billion barrels lower than 2024 levels [1]. However, critics warn that weaker fuel economy standards could leave consumers paying more at the pump over time despite the lower upfront vehicle costs [5].