- NHTSA finalized a rollback on September 28, setting a fleetwide average of 34.5 mpg for model year 2031.
- The 34.5 mpg target gives automakers room to keep building SUVs and pickups.
- NHTSA estimates the rollback cuts average new-vehicle costs by $930.
The Trump administration finalized a rollback of federal fuel economy standards on September 28, replacing a Biden-era target that automakers had called unreachable. NHTSA's new proposal sets a fleetwide average of 34.5 mpg for passenger cars and light trucks by model year 2031.
