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Old 05-28-2021, 03:16 PM   #1
Tobin
 
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Is All DEF Created Equal?

Can't believe I am asking this but I need to add DEF to my truck soon. Is all DEF the same or is one brand better than the other?
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2006 Dodge 2500 QCLB 4x4 Goerend 48RE

1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
 
Old 05-28-2021, 03:43 PM   #2
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This question makes me feel dirty.
Random internet query so I'm not totally useless:
5 Best Diesel Exhaust Fluids - June 2021 - BestReviews (Who writes this stuff?)
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Old 05-28-2021, 03:45 PM   #3
sootie

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its all the same.
 
Old 05-28-2021, 04:49 PM   #4
mhuggler

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Quote:
Originally Posted by Tobin View Post
Can't believe I am asking this but I need to add DEF to my truck soon. Is all DEF the same or is one brand better than the other?
I test DEF in customer’s equipment and storage tanks pretty often. The brand doesn’t matter as the ammonia content has been standardized. It’s all about the storage; it needs to be kept cool and dark. UV rays destroy DEF fairly quick.
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2002 2500 4x4 ETH/DEE-F1 Mach 5's/62/65/12/Smarty/ATS Ex.manifold/AFE intake/TST Comp./.020 marine gasket/o-ringed/ARP studs/5"stacks/Airdog 150/Isspro guages/Southbend 3600 DD/3.54 gears/leveling kit/Bilstein 5100frt,5150rr/37" BFG A/T's on 18" Eagle 114's/Borgeson SS/DSS
 
Old 05-28-2021, 06:41 PM   #5
Tobin
 
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Thanks, I'll try and find some place with a high turnover that hasn't been sitting around.
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2006 Dodge 2500 QCLB 4x4 Goerend 48RE

1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
 
Old 05-31-2021, 01:26 PM   #6
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Quote:
Originally Posted by mhuggler View Post
I test DEF in customer’s equipment and storage tanks pretty often. The brand doesn’t matter as the ammonia content has been standardized. It’s all about the storage; it needs to be kept cool and dark. UV rays destroy DEF fairly quick.
This. I have been selling DEF since 2008 when our tractors went to it...not a big deal, as long as it's kept out of the sun. I have even had customers use DEF that is 3 years old, but was stored in a dark corner of a heated building, and it gave them zero problems.

It's all about the concentration, and you have to remember that 67.5% of it is water, and can evaporate.
Chris
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Old 05-31-2021, 08:53 PM   #7
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Some distilled water with the def will help
Clean the injector as well.
 
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