Is Walmart DEF good enough? - Page 3 - Chevy and GMC Duramax Diesel Forum
2017-19 GM T-K2 Platform Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #21 of 64 (permalink) Old 12-03-2019, 07:59 AM
 
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I have used the Walmart brand with no problems, 34000 miles. I check the dates of manufacture to get the freshest. Walmart brand is date marked and easily found. I still have not found the Blue DEF date code.
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post #22 of 64 (permalink) Old 12-03-2019, 09:48 AM
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Date Code

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Originally Posted by in2pro View Post
Walmart's brand is what I've been using and have had no issues. As long as the DEF has a current date code it's all the same stuff. 32.5% urea to water.
What does the date code on Walmart Supertech DEF represent manufacture date or drop dead date?

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post #23 of 64 (permalink) Old 12-03-2019, 10:32 AM
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MFG date.

There are charts out there on the web that will tell you the life expectancy at given temperatures, the hotter its stored at, the shorter the life. I opted to user the Supertech from Walmart because I know they go trough it pretty regularly so it is likely to always be fresh.
I do keep 2.5 Gal at the house and I should probably use that bottle within the next 6 mo.
I will not buy it from HD or Auto parts stores as I do not know how long its been on the shelf, and absolutely will not buy it off of Amazon as you know that has likely been on a shelf for months to years...
I don't have an at the pump station close by so Wallyworld is the best option for me.
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post #24 of 64 (permalink) Old 12-04-2019, 06:11 AM
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same as others,,wally world def. no problems and dates on the jugs are curent.plus its cheap

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post #25 of 64 (permalink) Old 12-04-2019, 06:12 AM
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Lol cost way more than bulk dunno why people use


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post #26 of 64 (permalink) Old 12-05-2019, 02:55 PM
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Because many of us live in the country and work in the country and donít have access to bulk thatís why we use Walmart!
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post #27 of 64 (permalink) Old 12-05-2019, 03:21 PM
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Hahaha I do too lol itís everywhere. Dunno


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post #28 of 64 (permalink) Old 12-05-2019, 03:29 PM
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Wow!
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post #29 of 64 (permalink) Old 12-05-2019, 04:39 PM
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Originally Posted by mwswarrior View Post
Have used Tractor Supply store brand for a while with no issues. Now using Bucee's station for pumped DEF. Again, no issues.
Buc ee's sells DEF inside also. its 6.81 with TAX (yesterday) it is the SAME bottle as the Walmart comes in except its white Same exact funnel as well.... and it is less than WalMart ... if you have a Buc ee's close that doesn't have it at the pump.
They turn it over pretty fast as well. so it has to be fresh I would think.
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post #30 of 64 (permalink) Old 12-05-2019, 04:45 PM
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I mainly used Walmart brand in my 2011 Duramax which had 115K on it when traded for my current 2018, which has only had Walmart brand.
Almost all my usage is towing a 20K Fifthwheel so it burns thru it's share of DEF and no issues.
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