Clean Fuels Alliance America

12/30/2025 | Press release | Distributed by Public on 12/30/2025 04:09

Clean Fuels Applauds CARB’s Decision to Sunset Outdated Biodiesel Restrictions

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JEFFERSON CITY, MO - Clean Fuels Alliance America welcomes a ruling by the California Air Resources Board (CARB) to sunset the oxides of nitrogen (NOx) mitigation requirement for biodiesel blends up to B20 (20% biodiesel) in the Alternative Diesel Fuel (ADF) regulation.

Clean Fuels first called for sunsetting the B20 restrictions in the ADF in 2022, after CARB data showed the regulatory triggers for lifting the restrictions had been met.

California previously required producers to mix a minimum of 55% renewable diesel with biodiesel blends from B6 to B20 to mitigate NOx concerns in older heavy-duty vehicles. CARB's own emissions modeling shows this step is not needed and has contributed to keeping overall biodiesel blends below 10%. Since biodiesel is more affordable than fossil diesel for fleet operators, lifting the ADF restriction enables market growth, marking a significant milestone for the clean fuels industry.

While recent CARB actions have created regulatory headwinds for biodiesel, the decision to sunset the NOx mitigation requirement is a constructive step forward based on solid data acknowledging biodiesel's established role in helping California meet its Low Carbon Fuel Standard (LCFS) targets.

"Sunsetting the NOx requirement in the ADF regulation recognizes what the data has shown for years-that biodiesel is a proven, low-carbon fuel already effectively regulated under the LCFS," said Jeffrey Earl, Director of State Governmental Affairs at Clean Fuels. "This decision provides regulatory clarity and reinforces biodiesel's value as a cost-effective compliance option that benefits fuel providers, fleet operators and consumers."

Clean Fuels will continue challenging CARB to ensure California's clean fuels policies are grounded in sound data and recognize the reliable performance of low-carbon liquid fuels while maintaining a balanced approach that advances emissions reductions and protects fuel affordability and supply reliability.

The Executive Order sunsetting the ADF regulation's NOx mitigation requirement takes effect Jan. 1, 2026. A copy of the Executive Order can be found here.

Contact: Heather Buechter, 479-651-7301, [email protected]



ABOUT CLEAN FUELS ALLIANCE AMERICA

Made from an increasingly diverse mix of resources such as recycled cooking oil, soybean oil, and animal fats, the clean fuels industry is a proven, integral part of America's clean energy future. Clean Fuels Alliance America is the U.S. trade association representing the entire biodiesel, renewable diesel and sustainable aviation fuel supply chain, including producers, feedstock suppliers and fuel distributors. Clean Fuels receives funding from a broad mix of private companies and associations, including the United Soybean Board and state checkoff organizations.


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Clean Fuels Alliance America published this content on December 30, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on December 30, 2025 at 10:09 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]