DEF usage ?

Discussion in '6.7 Common Rail' started by blacklabbob, May 20, 2014.

  1. blacklabbob

    blacklabbob Junior Member

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    First week with new 2014 3500 Dually Laramie, Cummins 6.7 ltr.
    Previously heard stories about some users getting up to 10K miles on a tank of DEF. My truck had 250 miles not towing, and 520 miles towing a 14K camper and used nearly :boxed:the entire tank of DEF. Interested in other Cummins w/ DEF users experience.
     
  2. HLram

    HLram Senior Member

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    I don't own a Cummins, but I do know that the guys that I work with have a few and a bunch of Fords that use the DEF. They all tell me it depends on how much you tow and idle etc. I wonder if it uses more at first than after it breaks in? I never have heard from them about that, sorry.
     
  3. UneasyJmitchell

    UneasyJmitchell Senior Member

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    Define DEF.
     
  4. Badunit

    Badunit Member

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    That is way more than normal usage from all I have read. I think you should be getting at least 5K from a full tank of DEF. At the DEF usage you are talking about, you would have to refill the DEF tank at every fuel stop. Are you sure the tank wasn't nearly empty to start with?
     
  5. HLram

    HLram Senior Member

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    Diesel Exhaust Fluid (horse pee)
     
  6. UneasyJmitchell

    UneasyJmitchell Senior Member

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    ^Thanks
     
  7. HLram

    HLram Senior Member

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    yessir
     
  8. Rotzilla

    Rotzilla Senior Member

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    I burned 3/4 tank of def last summer in 2600 miles. Most of it consumed on three trips pulling my TH, approx 6K lbs. Went an additional 3500 miles after refilling, and burned 1/3 tank not pulling. So I could see 10k between refills, but she sure the hell aint gonna do it pulling 14k.
     
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  9. RyeThomas

    RyeThomas Member

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    Also remember the dealer delivers these trucks without toping off, sad to say but you buy a $40K-70K truck and they won't fill it. Their have been a few articles as well on the way the DEF gauge works due to the fact DEF freezes its not a float style sending unit. It is a computer guess for the first 1/2 then some sort of light/beam (laser beam :laughing1:) turns on and detects the fluid level from 1/2 to empty. So the only way to really know is top it full yourself then track it. Many have reported it being on full way too long then the bottom falls out.
     
  10. Moparman1303

    Moparman1303 Senior Member

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    Sounds like a great system....

    Sent from my LG-D803 using Tapatalk
     

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