US retreats from CAFE rules in big fuel economy policy shift

The Trump administration is revising fuel economy rules under a new framework, with final standards expected in 2026 while current guidance remains in effect.

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A white semi truck awaits refueling at a truck depot.
A white semi truck awaits refueling at a truck depot.
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The White House announced this week it intends to reset "the Biden Administration's costly and unlawful Corporate Average Fuel Economy (CAFE) standards," reshaping the regulatory framework that governs fuel efficiency standards for the nation's light-duty vehicles.

The changes to these standards are likely to reach light commercial trucks and vans, alongside separate initiatives to weaken rules for heavier commercial vehicles. No specifics have been announced at this time.

[Related: EPA won't delay 2027 NOx rule, but plans 'major changes']

Furthermore, the White House fact sheet says it intends to set "realistic, congressionally mandated" levels based largely on gas- and diesel-vehicle performance, replacing the more aggressive goals planned for the early 2030s. 

The President said prior fuel economy standards exceeded legal limits by relying on EV credits and credit trading. The shift aligns with a June 2025 NHTSA interpretation requiring CAFE targets to reflect only internal-combustion vehicle capability. According to the White House, the update keeps the program within Congress’s original statutory framework.

[Related: OEMs win first round of CARB's Clean Truck lawsuit]

The administration estimates that revising the standards will spare consumers about $109 billion over five years by avoiding roughly $1,000 in added costs per new vehicle. It also says the shift could improve safety by speeding the adoption of newer and safer vehicles, thus reducing injuries and deaths through 2050.

The new framework is designed to give automakers greater leeway in balancing gas, diesel, and hybrid vehicle production. Industry groups say earlier targets were costly to meet, but environmental and health advocates warn the changes could increase fuel consumption and emissions over time.

The administration is set to initiate a formal rulemaking process guided by the reset framework, which will involve releasing a proposed rule and inviting public comments. After considering feedback and completing regulatory analyses, agencies will establish the final standards for upcoming model years, with updated fuel-economy requirements expected to be announced in 2026. In the interim, federal officials have stated that the CAFE program will continue to operate under the June 2025 interpretive guidance.

Jay Traugott has covered the automotive and transportation sector for over a decade and now serves as Senior Editor for Clean Trucking. He holds a drifting license and has driven on some of the world's best race tracks, including the Nurburgring and Spa. He lives near Boulder, Colorado and spends his free time snowboarding and backcountry hiking. He can be reached at [email protected].

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The following survey was sent as a link in an email cover message in February 2023 to the newsletter lists for Overdrive and CCJ. After approximately two weeks, a total of 176 owner-operators under their own authority, 113 owner-operators leased or assigned to a carrier and 82 fleet executives and 36 fleet employees from fleets with 10 or more power units had completed and submitted the questionnaire for a total of 407 qualified responses. Cross-tabulations based on respondent type are provided for each question when applicable.
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