Is Walmart DEF good enough? - 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 #1 of 46 (permalink) Old 12-01-2019, 04:04 PM Thread Starter
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Is Walmart DEF good enough?

My DEF tank needs its first refill. So I went to Walmart to get the Peak brand Blue stuff I see advertised for about $12.75 for 2.5 gallons. I noticed on the self next to it the Walmart brand for $7.88 per 2.5 gallons. Same specifications on both and big difference in price.

Do any of you guys have a good reason to use the Peak DEF and NOT USE the Walmart DEF?
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post #2 of 46 (permalink) Old 12-01-2019, 04:25 PM
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I will not shop at Walmart so I cannot speak to their product BUT used the Loves and the OíReilly Auto Parts brands that are much cheaper no issues so far.

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post #3 of 46 (permalink) Old 12-01-2019, 04:26 PM
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Do you have a bulk filling station close to you? I just paid $14 to fill mine with 5 gallons. Plus itís fresh versus sitting on the shelf for who knows how long.


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post #4 of 46 (permalink) Old 12-01-2019, 04:56 PM Thread Starter
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Do you have a bulk filling station close to you? I just paid $14 to fill mine with 5 gallons. Plus itís fresh versus sitting on the shelf for who knows how long.


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No, I do not know of a bulk filling station near me. I live in a very rural area. From the price you quoted, I will look for one.

Thanks for the response.

2018 GMC 2500HD LTZ Duramax 6.6 L
Z-71 package 4 X 4 with 20" 265 X 60R tires
Crew Cab with 6.5' box
Manufactured 5-2018
Bought 12-17-2018
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post #5 of 46 (permalink) Old 12-01-2019, 05:09 PM
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Originally Posted by Old Man Bro View Post
No, I do not know of a bulk filling station near me. I live in a very rural area. From the price you quoted, I will look for one.

Thanks for the response.
Truck stops usually have bulk.

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post #6 of 46 (permalink) Old 12-01-2019, 05:22 PM
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Originally Posted by redwngr View Post
Truck stops usually have bulk.
Passed one last night, advertising $1.99/gal def

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post #7 of 46 (permalink) Old 12-01-2019, 05:36 PM
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post #8 of 46 (permalink) Old 12-01-2019, 06:40 PM
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Originally Posted by Hook'em_Horns! View Post
Passed one last night, advertising $1.99/gal def
Besides being the cheapest way to acquire it, the tank can be filled completely without having to manage any extra leftover.
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post #9 of 46 (permalink) Old 12-01-2019, 07:24 PM
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Yeah, but those truck stop fillers run so fast that my truck would blow def out all over the engine and me while I tried to fill up. The last time I had to run it so slow that it took 15 minutes to fill the tank and I still had it come out a few times. I’ll stick to the bottle. I am curious as to who makes the Walmart brand of def and if it is worth a darn. I use the Blue, but I wouldn’t mind saving a few bucks.
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post #10 of 46 (permalink) Old 12-01-2019, 07:24 PM
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Have used Tractor Supply store brand for a while with no issues. Now using Bucee's station for pumped DEF. Again, no issues.
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