Full Breakdown
Environmental Groups Challenge Trump Administration’s Rollback of Fuel-Efficiency Standards
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New CAFE Rule Lowers 2031 Fleet Target
The Department of Transportation announced final Corporate Average Fuel Economy (CAFE) standards that set a projected fleet-wide average of 34.9 mpg by model year 2031, a reduction from the 50.4 mpg projection under the 2024 rules. The rule also ends trading of compliance credits for vehicles built from model year 2028 onward. Transportation Secretary Sean Duffy said the change will lower the upfront cost of new vehicles by $1,300 and give automakers more flexibility in model choices.
Background and Context
The CAFE program, created after the 1975 oil embargo, requires manufacturers to meet average mileage targets across their fleets. The previous Biden-era standards aimed for a faster rise in efficiency, encouraging electric-vehicle production. The Trump administration argues the 2024 standards exceeded congressional intent and pushed manufacturers toward costly electric models. The new rule, signed by NHTSA Administrator Jonathan Morrison, will take effect 60 days after publication in the Federal Register.
Official Statements & Responses
Secretary Duffy framed the revision as a correction of an “illegal mandate” that forced automakers to produce expensive electric vehicles that “American families didn’t want.” The Transportation Department also projected the rule will cut annual oil consumption in 2050 by about 1.3 billion barrels and save Americans $138 billion over five years.
Criticism & Opposition
Environmental and public-health groups contend the rollback will raise fuel costs and worsen air quality. Katherine García, director of the Sierra Club’s Clean Transportation for All campaign, warned that “less fuel-efficient cars mean more gas burned, spending more at the pump.” Plaintiffs, including the Sierra Club, Public Citizen, the Center for Biological Diversity, Conservation Law Foundation, and the Environmental Defense Fund, plan to file a lawsuit on Friday, with the filing reported on October 2, 2026.
Data & Statistics
- Projected 2031 fleet average: 34.9 mpg (Trump rule) vs. 50.4 mpg (Biden projection).
- Expected reduction in oil use by 2050: ?1.3 billion barrels.
- Estimated consumer savings: $138 billion over five years, per the department.
- Reported national gasoline price: $4.40 per gallon and $4.47 per gallon, reflecting a rise from roughly $3.13 per gallon a year earlier.
Verbatim Quotes
- “It is unlawful for Trump to turn back the clock on fuel-efficient cars, forcing drivers to waste more money on gas and communities to breathe toxic air,” — Katherine Garcia, Sierra Club's Clean Transportation for All Director
- “Less fuel-efficient cars mean more gas burned, spending more at the pump,” — Katherine García, director of the Sierra Club's Clean Transportation for All campaign