Final rule · 2026-00154

Petroleum-Equivalent Fuel Economy Calculation

The U.S. Department of Energy (DOE) is amending its regulations in compliance with a United States Court of Appeals for the Eighth Circuit court decision vacating the March 29, 2024 rule revising procedures for calculating a value for the petroleum-equivalent fuel economy of electric vehicles (EVs) used by the Environmental Protection Agency (EPA) in calculating light-duty vehicle manufacturers' compliance with the Department of Transportation's (DOT) Corporate Average Fuel Economy (CAFE) standards.