# Petroleum-Equivalent Fuel Economy Calculation
> **US Department of Energy** · Final rule, technical amendment. · Published 2026-01-08 · Effective 2026-01-08 · 91 FR 553
## Document
- **Document number:** 2026-00154
- **Category:** other
- **Sub-agency:** US Department of Energy
- **Federal Register citation:** 91 FR 553
- **CFR reference:** 10 CFR 474
- **Publication date:** 2026-01-08
- **Effective date:** 2026-01-08
- **Energy docket:** EERE-2025-VT-0073
## 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/01/08/2026-00154/petroleum-equivalent-fuel-economy-calculation)
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