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DOT Finalizes 2031 Fuel-Economy Standard at 34.9 mpg

By Drooid · Oct 3, 2026, 2:24 PM UTC · How we work

Summary

Story summary

U.S. Transportation Department issued final fuel-economy standards lowering the fleet average to 34.9 mpg by 2031.
The target dropped from the 50.4 mpg projected in 2024 rules to 34.9 mpg for 2031.
Environmental groups including the Sierra Club sued, saying the rollback will raise gasoline prices and emissions.
Transportation Secretary Sean Duffy said the rule will cut costs by $1,300 and expand automaker choice.

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Story summary

U.S. Transportation Department issued final fuel-economy standards lowering the fleet average to 34.9 mpg by 2031.
The target dropped from the 50.4 mpg projected in 2024 rules to 34.9 mpg for 2031.
Environmental groups including the Sierra Club sued, saying the rollback will raise gasoline prices and emissions.
Transportation Secretary Sean Duffy said the rule will cut costs by $1,300 and expand automaker choice.