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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old November 7th, 2013, 17:08   #1
Diesel126
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Default Adblue vs Blue Def

Is VW Adblue the same as blue def? The dealer is telling me that using anything but VW Adblue could damage the Adblue system causing engine light and or Adblue system failure. The blue def I am using has the same ISO standard that is listed on the VW Adblue tank. The car is in for repair for this reason and the dealer is telling me that someone put water in the tank or a low grade Adblue.
( blue def) The car runs fine just getting the count down to not restarting.
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Old November 7th, 2013, 17:46   #2
40native
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There's a lot of difference in the quaility of the DEF fluid out on the market but as long as you're buying a good quaility ISO certified DEF in a sealed container you should be fine. Contamination is the biggest issue with DEF. VW can only deny warranty strictly related to the part failed so if like your HHFP went out they can't use DEF as an excuse to deny warranty of a totally un-related part.
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Old January 11th, 2014, 22:55   #3
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Quote:
Originally Posted by 40native View Post
There's a lot of difference in the quaility of the DEF fluid out on the market but as long as you're buying a good quaility ISO certified DEF in a sealed container you should be fine. Contamination is the biggest issue with DEF. VW can only deny warranty strictly related to the part failed so if like your HHFP went out they can't use DEF as an excuse to deny warranty of a totally un-related part.
Sez who?
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Old January 11th, 2014, 23:15   #4
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Option 1: Dealer Service Advisor is up selling for the Parts Counter. A slimy tactic at best and one that borders on fraud depending on what is said.

Your are correct about the ISO standard. Def is mostly water in the first place and degrades over time.

Option 2: they are telling the truth. But I'd ask them what proof they have. Ask them for their lab report that states the def is out of spec.
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Old January 11th, 2014, 23:27   #5
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Option 2: they are telling the truth. But I'd ask them what proof they have. Ask them for their lab report that states the def is out of spec.
Thank-you
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Old January 12th, 2014, 00:14   #6
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If the vehicle is still under warranty, ask if they opened a VTA with Techline?

It is a pretty common issue for the DEF to freeze if the temperatures are at or below 10*

If it freezes, this could cause the problem you are explaining. Then when they take the vehicle into the shop, the AdBlue thaws and they never take that into account for the diagnosis.
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Old January 15th, 2014, 12:55   #7
bonno
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Where can I buy good quality DEF that is not AdBlue? I am in Seattle area and looking for a major Consumer to sell it. My dealer only sells half gallon bottles (i think that is the size).
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Old January 15th, 2014, 12:57   #8
compu_85
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All the parts stores near me (Autozone, Advance, CarQuest, etc) have it.

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Old January 15th, 2014, 16:22   #9
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Walmart sells DEF in a 2.5 gallon "box". Same stuff at the LAPS.
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Old January 15th, 2014, 17:49   #10
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are def and adblue different? i was under the impression that they were both just generic names. ???
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Old January 15th, 2014, 17:51   #11
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It's all the same stuff. You can use any DEF (diesel exhaust fluid) or AdBlue in your diesel with SCR. The cheapest place is on the pumps at truck stops... generally around $2.50/gallon or less.
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Old December 1st, 2017, 17:36   #12
ashu
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Peak Blue Def is ISO 22241 but generic walmart DEF is not
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Old December 2nd, 2017, 06:31   #13
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Quote:
Originally Posted by Fixmy59bug View Post

It is a pretty common issue for the DEF to freeze if the temperatures are at or below 10*
I didn't know that! Any solution to this? I'm surprised I haven't seen more posts about it from our members in the frozen tundra.
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Old December 2nd, 2017, 07:39   #14
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Yes, it is. That's why the tank includes heating elements.

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Old December 2nd, 2017, 09:50   #15
joetdi
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https://www.jmesales.com/commonly-as...ust-fluid-def/ This is info on DEF. It does freeze if it gets cold enough and is normal.
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