Prime Guard Ultrapure Diesel Exhaust Fluid 2.5 gal

Prime Guard Ultrapure Diesel Exhaust Fluid (DEF) is an excellent way to improve your vehicle's fuel efficiency, and lower maintenance costs, while also ensuring your vehicle meets or exceeds all EPA standards. Improves mileage, and reduces emissions. Ultrapure formula goes through water filtration at 6 different stages during the production process, resulting in the purest water quality possible.