Ethanol Definition and Specification

Prior to January 1, 2024, majority blended ethanol fuel is defined as a blend of gasoline and denatured ethanol that contains between 10% and 30% gasoline and 70% and 90% ethanol by volume. Beginning January 1, 2024, majority blended ethanol fuel is defined as a blend of gasoline and denatured ethanol that contains between 17% and 49% gasoline and 50% and 82% ethanol by volume.

Mid-range ethanol blend is defined as a blend of gasoline and denatured ethanol that contains between 20% and 50% denatured ethanol. Ethanol blended fuels must comply with ASTM Standard D5798-11.

(Reference Senate Bill 1963, 2023)