(4 pack) Super Tech DEF 2.5 Gallon – for Diesel Fuel Vehicles with SCR Selective
SuperTech DEF is a nontoxic solution of 67.5 percent purified water and 32.5 percent ultra pure automotive grade urea. SuperTech DEF is not a fuel or fuel additive. These are the highest quality and safety standards in place to ensure optimum SCR performance.