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Which DEF

This is a discussion on Which DEF within the 6.7 Common Rail forums, part of the Dodge Ram Cummins Diesel Forum category!
I need a little advice on DEF, I have 2.2k miles on mine and I need to start thinking about ...

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Old 10-20-2016, 07:45 PM   #1 (permalink)
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Ram Year: 2016
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Default Which DEF
I need a little advice on DEF, I have 2.2k miles on mine and I need to start thinking about which DEF to use. Which brand do you guys use? A buddy of mine also has a 3500, and he said I better us Ultrapure or I'm asking for problems. He said his system needed to be replaced because he didn't use Ultrapure from the get go. Is there any truth to sticking to certain brands?

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Old 10-24-2016, 10:53 PM   #2 (permalink)
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Ram Year: 2006
Engine: Hemi 5.7
I have a 2015 CTD with just about 16K on it. I have been using Blue DEF with no problems since day 1.

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Old 10-28-2016, 12:53 PM   #3 (permalink)
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Ram Year: 2014 Laramie
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I have a 2014 3500, and I have used about a dozen different types over the 2 years, found no difference between one or the other. Just make sure you look at the production date as DEF has a shelf life. But it is VERY easy to empty the DEF tank if you think your getting on the bad side of the shelf life. I have emptied mine once took about 5 minutes that was after about 12 months of the DEF in the tank, I know people will say I didn't need to empty it but at the price of DEF its easier to dump year old DEF than have to worry about it crystalizing in the tank and system.

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