(4 Pack) Super Tech DEF Diesel Exhaust Fluid, 2.5 Gallon Jugs, For SCR Vehicles
BlueDEF is a nontoxic solution of 67.5 percent purified water and 32.5 percent ultra pure automotive grade urea. BlueDEF is not a fuel or fuel additive. These are the highest quality and safety standards in place to ensure optimum SCR performance.