Ethanol Definition and Specification

Majority blended ethanol fuel is defined as a blend of gasoline and denatured ethanol that contains between 51% and 83% 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 35 Illinois Compiled Statutes 105/3-44 and 105/3-44.3)