Home / Agencies / DOE / 2026-00154
Final Rule

Petroleum-Equivalent Fuel Economy Calculation

Agency
DOE
Document Number
2026-00154
Published
January 8, 2026
Effective Date
January 8, 2026

Abstract

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.

Federal Register Source

This document is published by the Office of the Federal Register, National Archives and Records Administration. Access the full regulatory text, preamble, and docket comments below.

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Frequently Asked Questions

What is the 2026-00154 Federal Register document?
Document 2026-00154 is a Final Rule published by the Department of Energy in the Federal Register on January 8, 2026, with an effective date of January 8, 2026. 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. View the original at https://www.federalregister.gov/documents/2026/01/08/2026-00154/petroleum-equivalent-fuel-economy-calculation.
Is document 2026-00154 an economically significant rule?
No. Document 2026-00154 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.

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