Lubriguard 720015 DEF Fuel Additive, 1 gal Clear (Pack of 4)

Non-toxic, clear urea solution for use as a reducing agent for selective catalytic reduction systems in diesel-powered vehicles. Breaks down toxic NOx emissions. Stored in a supplementary tank on the vehicle. DEF is a 32.5% aqueous urea solution. Complies to global quality standards DIN 70070 and ISO 22241. Meets all EPA standards and bears the American Petroleum Institute API symbol. Online purchases are in packages of 4.