Check the listing for details. 1 Gallon ACDelco Diesel Exhaust Fluid DEF Urea based NOx Reduction Solution. Color: white, Condition: New. Listed at 22.59 USD. 1 Gallon ACDelco Diesel Exhaust Fluid DEF Urea based NOx Reduction Solution Description: Specifically designed for diesel engines, ACDelco Diesel Exhaust Fluid (DEF) is an aldehyde free, NOx (Nitrous Oxide) reducing treatment. ACDelco Diesel Exhaust Fluid is a stable, colorless, non-flammable, non-toxic primary component used to help convert NOx, an environmental pollutant, into harmless nitrogen and water. This product is a mixture of high purity synthetic urea and deionized water and is classified as minimum risk for transportation. ACDelco Diesel Exhaust Fluid meets the stringent ISO 22241 standard for purity and concentration, meets API regulations, and meets GM OE specifications. Features: Meets GM Original Equipment specifications to be approved for use in GM vehicles as well as in non-GM diesel vehicles that have an SCR (Selective Catalytic Reduction) system to meet regulated NOx emissions (Based on EPA certification testing. Your actual emissions will vary based on several factors including temperature, terrain, and driving conditions).High quality formula is made from high purity urea and deionized water.Meets API regulations and ISO 22241 standard for purity and concentrationNozzles sold separately