Dyed Diesel Fuel Enforcement Program
The Illinois Motor Fuel Tax Law as of January 1, 2000, requires that all special fuel sold or used for non-highway purposes must be dyed. Dyed diesel fuel must contain the dye Solvent Red 164 at a concentration spectrally equivalent to at least 3.9 pounds of the solid dye standard Solvent Red 26 per thousand barrels of special fuel. The dye must be added prior to removal from a terminal rack. We may require all special fuel sold for non-highway use to have a marker added.