(Price: $275.00/each) Diesel Exhaust Fluid is a key element of the Selective Catalytic Reduction (SCR) process used by many medium- and heavy-duty engine builders to meet EPA 2010 regulations. DEF is a non-toxic solution of 67.5% purified water and 32.5% ultra-pure automotive-grade urea. DEF helps convert NOx into nitrogen gas and water vapor, two harmless components of the air we breathe.


  • One gallon of DEF is used approximately every 300 miles
  • A truck with a 20 gallon DEF tank can go up to 6000 miles between fill-ups
  • When used in an SCR system DEF will reduce the levels of NOx emissions of those engines
  • Non-flammable
  • Diesel exhaust fluid


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