Brazil begins testing E35 gasoline blend amid legislative debate

The Brazilian government has formalized testing for E35 gasoline, a blend containing 35% anhydrous ethanol. This move follows the Future Fuel Law and aims to establish the maximum authorized ethanol content. The Ministry of Mines and Energy published the testing schedule, which is expected to continue through 2027. A final decision on whether to increase the mandatory blend will rest with the National Council for Energy Policy (CNPE) once results are analyzed.

Currently, common gasoline contains 32% ethanol, while premium gasoline contains 25%. The recent increase to 32% has faced resistance from vehicle manufacturers and importers, with the Federal Public Ministry previously requesting a suspension of distribution.

Legislative efforts are also underway to address concerns regarding high ethanol levels. Proposals in the Senate and Chamber of Deputies seek to allow the sale of pure gasoline or lower-blend options (such as E10) to protect vintage vehicles, non-bi-fuel fleets, and the nautical sector. Critics of higher blends, including the Brazilian Federation of Vintage Vehicles, warn that excessive ethanol can damage older engines by corroding rubber components and sensors.