The House of Representatives is scheduled this week to vote on legislation that would allow nationwide, year-round sales of E15 gasoline, a move aimed at expanding demand for corn-based ethanol. Year-round E15 vote has drawn bipartisan support in farm states but faces uncertain prospects as lawmakers weigh competing industry concerns. Analysts say the measure is one of the most direct ways to increase biofuel demand for corn growers contending with large supplies and rising input costs like fertilizer.
E15 contains 15% corn ethanol and supporters argue wider, permanent availability could meaningfully lift corn demand and farm income if adopted. Corteva CEO Chuck Magro told analysts that full E15 adoption “could consume up to another 15% of the U.S. corn crop,” a scale of demand that would matter during a period of record crops and higher production expenses. Farmers and farm groups have pressed the House for certainty that retailers can sell higher-ethanol blends year-round.
A one-percentage-point rise in the national ethanol blend would add significant volumes to corn demand, the National Corn Growers Association estimates: 486 million bushels of corn and about 1.36 billion gallons of ethanol in the 2025-2026 marketing year for each point. Regulatory constraints that have blocked warm-weather E15 sales in smog-prone areas remain a practical hurdle; the EPA has issued temporary waivers in prior years, but permanent authorization is what biofuels advocates say will prompt wider station adoption.
Policy and politics
This latest bill couples year-round E15 authorization with tighter limits on small refinery exemptions (SREs) from the Renewable Fuel Standard, a pairing that has reshaped traditional alliances. Some major oil companies have backed curbs on SREs, while small refiners and their trade groups say tougher limits would threaten plant economics. The Small Refineries of America coalition called recent amendments “completely detrimental” and urged narrower changes even as it signaled openness to year-round E15. The EPA and other officials finalized aggressive biofuel blending mandates in March, but conventional ethanol volumes in the mandates did not rise and current blending still trails the new targets.
The split inside the refining sector has become a chief obstacle to swift passage. Refiners point to infrastructure constraints that limit blending capacity, while a group representing truck-stop operators and some retailers argue weak consumer demand explains low E15 take-up. Biofuels trade groups counter that retailers are reluctant to invest or handle the administrative work needed to offer a seasonal fuel without regulatory certainty. Geoff Cooper, CEO of the Renewable Fuels Association, said most retailers “are not giving that choice to consumers because they’re not willing to make the investment or just the administrative burden to offer a seasonable fuel.”
A similar effort to expand E15 failed earlier this year, prompting lawmakers to form a congressional council to seek compromise on exemptions and retail hurdles, but divisions persist. The bill’s fate now hinges on whether lawmakers can reconcile refinery waiver changes with the goal of expanding year-round E15 sales; the House is expected to vote this week on the legislation.
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