Where do you buy your DEF? Preferred brand?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Deezl Smoke, Dec 22, 2021.

  1. Arctic_fox

    Arctic_fox Road Train Member

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    Def is about 70% water. If you keep topping off at say 80% def load. Then over time enough water will evaporate off in the near consistant def load to start to cause issues especially in hot dry enviroments. It takes a long time, say weeks or even months maybe more if your tank is better sealed then mine for example but i saw it begin to happen when i tested my own def, when i didnt let it burn enough off for too long. So its just cheap insurance to burn off enough to keep the ballence more in line.
     
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  3. 86scotty

    86scotty Road Train Member

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    I just get my DEF from the guy in the next parking spot who parks after me and runs his reefer all night. I figure we're even.
     
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  4. Goodysnap

    Goodysnap Road Train Member

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    I have never found DEF with a high concentration. It’s always diluted or low….always.
     
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  5. Arctic_fox

    Arctic_fox Road Train Member

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    Ive found it a couple times. One had only .07% water. Had to retest it 3 times to belive it. But i also fuel at ma and pas a lot
     
  6. Goodysnap

    Goodysnap Road Train Member

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    One of those things I guess I would have to see to believe.
     
  7. Deezl Smoke

    Deezl Smoke Light Load Member

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    Awe. Ok. That actually does make sense after watching a video about API certified DEF. They talk about storing it below 85F and out of the sunlight. Working on a farm, I know that when we sprayed melted urea or melted KCI (potash), and the water would evaporate in a few seconds, the previous solid product would appear as a film on the leaves of the plants.
    So would a new sensor system have issues with a bit over concentration vs. dilution?
     
  8. Goodysnap

    Goodysnap Road Train Member

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    The acceptance threshold is about plus or minus 2% from the correct level of 32.5%. Outside of that range and your gonna have issues.

    For the mathematically challenged that’s around 30.5 -35% range.
     
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