9.46-Litre Truck Diesel Exhaust Fluid is a non-toxic, high purity solution comprised of 32.5% urea and 67.5% de-ionized water. Using this fluid in diesel-powered vehicles (such as trucks, buses, and tractors) helps to reduce the amount of nitrogen oxides (NOx) emitted into the air by 90%. DEF is not a fuel additive and must be filled into the dedicated Diesel Exhaust Fluid tank on your diesel vehicle.
