The United States finalized new fuel efficiency standards for automobiles and light-duty vehicles that reduce the requirements planned for the coming years. The measure sets a fleet average of 34.9 miles per gallon (mpg) for 2031 and modifies the framework approved during the Joe Biden administration.
The new regulation from the National Highway Traffic Safety Administration (NHTSA) is part of the review of the Corporate Average Fuel Economy (CAFE) program. According to the Department of Transportation, the change seeks to reduce costs associated with new vehicles and provide greater flexibility to manufacturers.
However, official estimates themselves anticipate higher fuel consumption and more carbon dioxide emissions compared to the previous regulatory scenario. The modification also reduces the incentives that had driven manufacturers toward electric vehicles and higher-efficiency technologies.
Fuel efficiency drops to 34.9 mpg for 2031
The main change is in the fuel efficiency level projected for the U.S. fleet. The new standard projects an average of 34.9 mpg for model year 2031. For reference, the standard approved in 2024 estimated approximately 50.4 mpg for that same year.
Thus, the difference between the two frameworks exceeds 15 miles per gallon. The adjustment allows manufacturers greater margin to maintain vehicles with internal combustion engines within their portfolios over the coming years.
CAFE standards regulate the distance vehicles must travel per gallon of fuel and are applied through averages for each manufacturer’s fleets of passenger cars and light trucks. NHTSA is the agency responsible for establishing and enforcing these standards.
Previous regulation required greater efficiency improvements
In 2024, the Biden administration had established that passenger car efficiency would increase 2% annually between model years 2027 and 2031. For light trucks, the 2% increase applied between 2029 and 2031.
That framework sought to bring the light-duty vehicle average to approximately 50.4 mpg in 2031. NHTSA estimated at the time that the standards would save nearly 70 billion gallons of gasoline and avoid more than 710 million metric tons of carbon dioxide through 2050.
With the new provisions, federal policy shifts toward less stringent requirements. The Department of Transportation maintains that the final regulation will reduce the average cost of a new vehicle by approximately $1,300 and generate savings of $138 billion over five years. These figures correspond to the administration’s own estimates.
Manufacturers and environmental groups react to change
The Alliance for Automotive Innovation, which represents manufacturers including General Motors, Toyota, Volkswagen, Hyundai, and Ford, supported the modification. The group maintained that the new standards better align with current market conditions and questioned whether the previous regulation drove a transition toward electric vehicles that, in its view, did not correspond with consumer demand.
On the other hand, the Sierra Club announced its opposition to the easing. The environmental organization argued that reducing requirements will allow higher pollution levels and shift additional costs to consumers through greater fuel expenditure and environmental effects.
Thus, the new framework modifies the regulatory trajectory of the U.S. automotive market toward 2031. Manufacturers will face less stringent fuel economy requirements while the final impact on prices, gasoline consumption, emissions, and sales composition will depend on the industry’s and consumers’ response.
Source: StreetInsider.com
Photo: Shutterstock
