Trump weakens Biden-era fuel economy standards for cars and trucks

The administration’s affordability case rests in part on lower costs for manufacturers. NHTSA estimates average new-vehicle regulatory costs could be $1,289 lower in model year 2031 than under the prior standards—but that consumer savings depend on manufacturers passing the reduction along to buyers. The estimate is not a guarantee that a buyer’s price will fall by that amount.

For people who need a car, a lower purchase price can matter. But so does the cost of running it. CBS reported Monday, citing AAA, that gasoline averaged $4.47 a gallon, compared with $2.98 before the war with Iran disrupted global fuel flows. The rule did not cause that price increase; it does make the policy choice about how much fuel cars use harder to dismiss.

NHTSA estimates the new rule would lead to 122 billion more gallons of gasoline consumption through 2050 than under the 2024-standards baseline, a 4.6% increase relative to that baseline. The agency still projects total fleet gasoline use will decline over time under every alternative it considered. The point is not that fuel use must rise year after year, but that the rollback means more consumption than the stronger standards would allow. NHTSA also projects higher emissions than under the prior-standard baseline.

A manufacturer’s lower compliance costs are built into the estimate. A buyer’s share of those savings is conditional, while the added gasoline consumption is part of the agency’s projection. That imbalance is a reason to judge the rule by what it asks drivers to pay over time, not just by the administration’s promise of lower prices upfront.

The safety argument is a projection, not a result

Transportation Secretary Sean P. Duffy framed the change as ending “the illegal mandate that forced automakers to produce more expensive electric vehicles that American families didn't want,” in remarks reported by PBS News in an AP wire story. But CAFE standards set fleet-average fuel economy requirements for manufacturers; they do not direct a household to buy an electric vehicle.

The administration also says less costly new cars could encourage more purchases and improve safety. The Transportation Department projects that the rule will save Americans $138 billion over five years and prevent more than 300,000 serious injuries and 1,900 deaths by encouraging new-car sales. Those are the department’s projected benefits, not established outcomes. They depend on the claim that lower prices will lead to enough additional purchases to produce those safety gains.

Affordability deserves a serious answer, not a shrug. But NHTSA says its projections are uncertain and depend on future fuel prices, economic conditions, automaker decisions and consumer behavior. That uncertainty cuts both ways: the estimated price relief may not reach buyers in full, and the projected benefits are not guaranteed. It is no reason to discount the agency’s estimate that the weaker standards mean more fuel use.

Efficiency is the better public priority

The 2024 standards were designed to raise fuel economy and reduce fuel use and pollution. The administration now gives greater weight to lower compliance costs, vehicle affordability and consumer choice. Those goals can be debated, but weakening standards shifts the balance toward cheaper compliance while asking the public to absorb higher projected fuel consumption and emissions.

A rule that offers a possible purchase-price reduction while projecting more gasoline use is not a durable affordability policy. Drivers cannot control global fuel disruptions, but standards can push automakers to build vehicles that need less gasoline. That protection matters most when a household has little room to absorb another cost at the pump.

NHTSA should restore a stronger fleetwide efficiency trajectory rather than lock in weaker requirements. Congress should also require a public accounting of whether automakers pass compliance-cost savings to buyers and how the rule’s realized fuel use compares with the agency’s projections.