DEF

Discussion in '6.7L PowerStroke Engine & Drivetrain' started by stever01, Jan 7, 2018.

  1. stever01

    stever01 SDD Junior Member

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    I know a lot of you guys don't run def no more ,but since I have a 17 I will keep using it.. QUESTION IS . Is there any difference is DEF brands ? I know its mainly water for the most . just don't want to put just anything in it.
    Thanks

    Steve
     
  2. 01yellerCobra

    01yellerCobra Full Access Member

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    I've been running Peak DEF in mine since I bought it with no issues. I keep an eye out for sales at the local stores.

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  3. shooterchief

    shooterchief SDD Junior Member

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    I was going to ask the same question. My old ‘10 6.4 didn’t use DEF, but now my ‘17 6.7 does.
    I see the Blue Dot brand everywhere. Any opinions on this brand? Or any other brands?
     
  4. eZAK61

    eZAK61 Full Access Member

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    I think they are all exactly the same, 68% ionized water & 32% urea
     
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  5. BIG JOE

    BIG JOE Full Access Member

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    I agree. I've used just about ALL of the DEF Brands.. and have noticed absolutely NO difference.. in any of them. I carry a gallon of Peak, but top off with what ever is available at the pumps at truck stops, and my local Card Lock station. Blended the brands.. No Dif.
     
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  6. jaywillingham05

    jaywillingham05 SDD Junior Member

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    DEF seems to be like the oil question. They all meet a spec but DEF is all the same but oil isn’t. Just saying
     
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  7. stever01

    stever01 SDD Junior Member

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    Thanks
     

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