By Jonathan Stempel

(Reuters) -A U.S. appeals court on Friday voided a Biden administration-era rule that changed the calculation of the petroleum-equivalent fuel economy of electric vehicles, a victory for 13 Republican state attorneys general who said the rule overstated EVs’ efficiency.

The 8th U.S. Circuit Court of Appeals in St. Louis said the Department of Energy exceeded its authority by deciding to phase out during the 2027 to 2030 model years a “fuel content” factor that artificially inflated EV fuel economy, rather than eliminating that factor.

Writing for a three-judge panel, Circuit Judge Duane Benton said the department also failed to provide notice of the range of alternatives it was considering when it sought comments for the March 2024 rule, depriving commenters a chance

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