Petroleum-Equivalent Fuel Economy Calculation
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Feb. 19, 2026. Document 2026-03300. Updated Nov. 14, 2026.
- What it does
The Office of Critical Minerals and Energy Innovation (formerly the Office of Energy Efficiency and Renewable Energy) of the Department of Energy (DOE) has reviewed the petroleum-equivalency factor (PEF) for 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. DOE has determined that revisions to the PEF are necessary. DOE is first publishing a final rule that removes the fuel content factor (FCF) from the calculation of the PEF. Removal of the FCF is consistent with a United States Court of Appeals for the Eighth Circuit decision that held, among other things, that the inclusion of the FCF in the PEF calculation exceeded DOE's authority under the substantive statute. DOE will propose additional revisions to the PEF in a forthcoming notice of proposed rulemaking.
The Energy Department's summary, as published in the Federal Register.
- What changed in the regulation
1 part of Title 10 of the Code of Federal Regulations:
Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).
- Compared with
The Energy Department has published 18 final rules in 2026 so far, compared with 33 in all of 2025.
Counted by the Tribune from Federal Register records since Jan. 1, 2025.
- Before this
No earlier Federal Register document under regulation identifier 1904-AF47 since Jan. 1, 2025.
- What happens next and when
The effective date of this interim final rule is February 19, 2026. DOE will accept comments, data, and information regarding this interim final rule no later than March 23, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-03300 |
|---|---|
| Action | Interim final rule; request for comments. |
| Agencies | Energy Department |
| Published | Feb. 19, 2026 |
| Effective date | Feb. 19, 2026 |
| Comments close | March 23, 2026 |
| Regulation identifier (RIN) | 1904-AF47 |
| Docket | EERE-2025-VT-0073 |
| Significant (marked in the Federal Register) | Yes |
Source: the Federal Register (public domain). The document in the Federal Register