The National Highway Traffic Safety Administration (NHTSA) has finalized new rules that lower future fuel economy requirements for light-duty vehicles. The updated Corporate Average Fuel Economy (CAFE) standards, issued in late September, mandate that automakers achieve a fleet-wide average of 34.9 miles per gallon by the 2031 model year.
This represents a modification from previous regulations finalized in 2024, which had set the target at 50.4 miles per gallon for the same period. The regulatory adjustment follows a vote by Congress last year that eliminated the fines automakers previously faced for failing to comply with the federal standards.
The new NHTSA rules also end the system of selling and trading credits. Previously, automakers that produced vehicles exceeding fuel economy targets could sell credits to companies whose fleets fell short of the requirements. According to a Reuters report, General Motors and Stellantis have paid hundreds of millions of dollars in civil penalties in recent years for not meeting fuel economy standards for prior model years.
Industry analysts are assessing the potential effects of these changes on automakers’ financial strategies and vehicle production plans. Itay Michaeli, an analyst for TD Cowen, stated that the new rules could lower compliance costs for manufacturers.
According to Michaeli, the changes may allow automakers to shift investment away from what are sometimes termed “compliance cars”—less profitable, fuel-efficient models or electric vehicles (EVs) produced primarily to meet regulatory targets. He suggested this could lead to “ICE optimization,” where companies focus on selling more profitable vehicles, which often have larger engines.
Several major automakers have recently announced plans related to V-8 engines. Stellantis is reintroducing V-8 engines for its Ram full-size pickup line. General Motors announced in September it will offer a new generation of V-8 engines in its Silverado and Sierra pickup trucks. Ford has also increased the availability of V-8 engines in its F-150 pickups.
The new regulatory environment comes after some automakers reported significant financial impacts related to EV investments. Ford announced a $19.5 billion special charge in December as part of a business restructuring and a reduction in EV investments. GM recorded a $7.1 billion charge in its fourth quarter related to its own EV pullback and restructuring.
John Murphy, another automotive analyst, commented on the uncertainty facing the industry regarding future powertrain technology. “Balance sheets and cash on balance sheet may need to be far higher than they thought previously, because there’s such extreme uncertainty around where powertrains need to ultimately go,” Murphy said.
Despite the changes to fuel economy rules, Murphy noted an increase in the U.S. market for hybrid vehicles. “Our forecasts are that hybrids, absent a change in the regulatory regime, will go from 14% of the market last year to about 34% of the market by the end of the decade,” he said.
Michaeli stated that EV demand is expected to continue growing, citing high owner loyalty rates and the high number of two-car households in the U.S. According to the Alliance for Automotive Innovation, a trade group, approximately 7.5 million of the 300 million vehicles on U.S. roads are electric.
