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Road_Phantom's avatar
Road_Phantom
Explorer II
Jun 04, 2017

Required diesel additive for all new trucks

I heard all new diesel engines require some kind of additive and that the manufacturers have to include some sort of gizmo that sprays it into the cylinders for compliance with the EPA. I'd like to know a little more about this slight inconvenience and whether or not its true. Thanks.

22 Replies

  • YES......
    It is call DEF (Diesel EXHAUST Fluid)
    A mixture of 32.5% Urea and 67.5% Deionized Water
    Has it's own 'tank' and gets sprayed into SCR in exhaust to lower NOx emissions

    Can purchase at Walmart or even can pump it at 'truck' stations

    DEF
  • Are you unaware of DEF
    http://www.discoverdef.com/def-overview/