Alternative Fuel and Special Fuel Definitions

The definition of alternative fuel includes propane. Special fuel is defined as all combustible gases and liquids that are suitable for powering an internal combustion engine or motor or are used exclusively for heating, industrial, or farm purposes. Special fuels include biodiesel, blended biodiesel, and natural gas products, including liquefied and compressed natural gas.

(Reference Indiana Code 6-6-2.5-1 and 6-6-2.5-22)