Here in IL they have K1 undyed which does not have a road tax included in the price,can not be used in a vehicle.K1 with the dye is also available,K1 dyed has got a tax included in the price,it can be used in a vehicle on public streets.The station closest to me sells the died K1 for 2.99 a gallon,I have been using the dyed with no problems, same stuff here other then the dye and tax.