HF Sinclair sues EPA over delays in biofuel exemption decisions

Energy giant HF Sinclair filed a lawsuit against the U.S. Environmental Protection Agency (EPA) on July 24, 2026, accusing the agency of stalling on decisions for refinery exemptions from federal renewable fuel blending mandates. The company claims the EPA has dragged its feet on rulings that refiners say are critical to their financial survival, as blending biofuels into gasoline and diesel is a costly obligation under current law. HF Sinclair argues that compliance credits used to meet these mandates expire on September 1, 2026, and that the EPA could have resolved exemption requests months ago. The lawsuit highlights the mounting pressure on refiners, particularly small and medium-sized operations, which rely on exemptions to avoid disproportionate economic hardship. The dispute coincides with broader political battles over biofuel policy, including a congressional push to allow year-round nationwide sales of E15 gasoline—a higher-ethanol blend. A recent House-passed bill tied E15 expansion to cuts in blending mandate exemptions, but the proposal faces strong opposition in the Senate. The EPA declined to comment on the pending litigation. The case underscores the tension between renewable fuel mandates, refiner profitability, and agricultural demand for expanded biofuel markets.