Trusted by owners of modern diesel vehicles, diesel exhaust fluid (DEF) will have you achieving excellent vehicle performance and fuel economy, while meeting emission standards. A non-toxic, highly pure solution of urea and de-ionized water, DEF is the operating fluid in diesel engines using selective catalytic reduction (SCR) technology to reduce exhaust emissions. You can also avoid clogging or damaging in the catalytic converter and prevent loss of efficiency, costly parts replacement and engine downtime.
Diesel Exhaust Fluid (DEF) is a pure, aqueous solution of urea and water, to be used in new diesel SCR engine technology.
AIR1® DEF is API Certified to guarantee product quantity
AIR1 Diesel Exhaust Fluid - 9.46 L
Meets automotive industry specification defined by ISO 22241
Required in trucks using SCR technology, DEF helps reduce emissions of NOx gases that are produced inside the engine during combustion