A major rollback in federal fuel efficiency standards has been finalized, lowering the required fleet-average fuel economy for automakers to 34.9 miles per gallon—nearly 16 mpg less than the 50.4 mpg target set by the previous administration. The shift reverses years of stricter emissions and efficiency regulations, raising concerns about increased greenhouse gas emissions and higher long-term fuel costs for consumers. Industry groups have welcomed the change as a more realistic benchmark, while environmental advocates argue it undermines progress toward climate goals. The decision marks a significant policy shift with broad implications for automakers, consumers, and environmental policies.
The new rule will require automakers to meet a fleet-average fuel economy of 34.9 mpg, down from the 50.4 mpg required under the Biden administration.
