The Flex Fuel Fairness Act of 2025 would change how the Environmental Protection Agency (EPA) treats flexible fuel vehicles when calculating fleet average carbon dioxide (CO2) standards. The bill says the EPA must update 40 C.F.R. §86.1818-12 within 120 days so that automakers may use a CO2 gram-per-mile value for a flexible fuel vehicle that is 31% lower than the value for the same make and model that is not a flexible fuel vehicle. The bill includes a finding that the GREET model from Argonne National Laboratory estimates E85 made with average corn starch ethanol reduces greenhouse gas emissions by 37% per mile compared to gasoline with no ethanol. The bill also lets the EPA apply a larger percentage reduction if a newer version of the GREET model supports it. The bill defines "flexible fuel vehicle" by referencing 40 C.F.R. §86.1803-01 and defines "manufacturer" by referencing section 216 of the Clean Air Act.
No publicly available information about costs, savings, or budget effects is included in the bill text or metadata provided.
Proponents note the bill cites the GREET model finding that E85 made with average corn starch ethanol reduces greenhouse gas emissions by 37% per mile compared with gasoline with no ethanol. They argue the EPA should let manufacturers use a lower CO2 gram-per-mile value for flexible fuel vehicles (31% lower under the bill) and may allow a larger reduction if future GREET model versions justify it.
No publicly available information about opponents' views or objections is included in the bill text or metadata provided.