Blue Def 2.5gal Diesel Exhaust Fluid

BlueDEF is a nontoxic solution of 67.5% purified water and 32.5% ultra pure automotive grade urea that helps convert NOx into nitrogen gas and water vapor, meeting ISO Standards 22241 for purity and composition and American Petroleum Institute (API) certified diesel exhaust fluid standards.

It is stable, colorless, and odorless, and provides everything you need to improve fuel economy by up to five percent with our patented closed liquid dispensing system.

Don't run out of BlueDEF - watch the DEF gauge for when it's time to refill, stored in a dedicated tank next to the fuel tank on the driver's side.