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Old 04-01-2019, 01:11 PM   #57
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Walmart DEF

I have used Walmart DEF for the past year with no issues or problems. The diesel mechanic at Hanner Chevrolet saw its just as good as anyone elseís.
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Old 04-01-2019, 01:25 PM   #58
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I'm a newbie - what does DEF stand for ?
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Old 04-01-2019, 02:39 PM   #59
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I'm a newbie - what does DEF stand for ?
Diesel Exhaust Fluid. Newer diesel engines require it for emission control. It is a uric acid mixture sprayed into the exhaust.
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Old 04-01-2019, 02:57 PM   #60
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Two things I hear constantly on this forum that I don't agree with and mind you I'm not trying to start an argument.
When someone says
"I've been doing it this way for so long and haven't had a problem yet." How does this person know that the problem may be just around the corner? This does not give me justification that its OK then.
OR
"As a dealer service advisor told me about 3 months ago.... (sotto voce) ..... "DEF is DEF. Get it at WallyWorld. Ours it too expensive!"

What makes a service adviser an expert on DEF?

I agree Walmart DEF is probably just fine, But I go back to my original question.
If it is ISO why do they choose not to label it as such? Seems like it would help sales.

Could be they would rather sell the more expensive Blue DEF? They do offer both.
by law all products labeled as def must meet ISO 22241-1 standards so

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Old 04-01-2019, 03:16 PM   #61
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Just learned that urea isn’t the same as uric acid: Difference Between Urea and Uric Acid | Difference Between | Urea vs Uric Acid

Interesting factual.

Not sure which they use making DEF.
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Old 04-01-2019, 03:33 PM   #62
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Just learned that urea isnít the same as uric acid: Difference Between Urea and Uric Acid | Difference Between | Urea vs Uric Acid

Interesting factual.

Not sure which they use making DEF.
DEF is 32.5% Urea, common liquid fertilizer from ag plants and RO permeate/deionized water
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Old 04-02-2019, 05:43 AM   #63
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DEF

Gotta get rid of the Egr & the Dpf. Let that thing breath...
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Old 04-02-2019, 07:09 AM   #64
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Good luck making your own DEF. There is a big difference between fertilizer urea and high grade environmental grade urea and it's DI water not RO water.
Actually RO permeate that is ran through a mixed bed polisher
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Old 04-02-2019, 08:30 AM   #65
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My DP uses a gallon of DEF every 420 miles. My 13 gallon tank will get me over 5,000 miles. At 3500-4000 miles, I start looking for a pump. They're easy to find and easy to use. Why bother with the jugs from Wally or any other brand??
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Old 04-02-2019, 01:32 PM   #66
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I've used the Wal-Mart brand many times. No problems with it what so ever.
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Old 04-02-2019, 06:35 PM   #67
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I have used Walmart and had no issues! I do keep two containers on my coach, just in case. Enjoy!
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Old 04-02-2019, 06:43 PM   #68
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My DP uses a gallon of DEF every 420 miles. My 13 gallon tank will get me over 5,000 miles. At 3500-4000 miles, I start looking for a pump. They're easy to find and easy to use. Why bother with the jugs from Wally or any other brand??
I agree with you. However, in my situation for example we do many short trips to mountains and deserts with no big fuel stops on the way. Sometimes we are returning home late at night. I don't want to stop and find a station with DEF (even if there were one on those nights) so I often put a jug in or two at home just to keep it topped off. When on the road for a long trip, I do pump DEF...cheap and easy.. As you said, I only need to find DEF every 3000 miles or more.
I have been using DEF since 2012 or 2013 and I have never run out or never had a problem finding it. There is a fairly substantial 1500 mile cushion or more before you need to add DEF when it is getting low. Clearly not an issue. Also, DEF seems to be a good thing and the engine runs more efficiently with better MPG and less pollution. I have no problem with DEF.
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Old 04-02-2019, 09:26 PM   #69
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Also carrying a container home and back to Walmart would just be too much work for a thief;

My MIL was a greeter at Wal-Mart and as part of a greeter's duties, they have to check certain customers on their way out to be sure they have receipts, etc. You would not believe the stories of what a thief will do.



My favorite was a woman with a cart full of stuff. When my MIL checked her receipt, everything on the receipt was the same item and 20 cents each. This thief took the time to take the cart of stuff she wanted to some trinket items shelf, peeled off all the bar code price labels on the cheap trinkets and stuck them on each of the items in her cart. That way when she went to a self-checkout, it appeared to anyone looking she was scanning everything, but actually it was all ringing up at 20 cents each. Some criminals will stop at nothing to steal.



BTW...the woman's actions were all on store video, so it was her that stood there peeling labels off cheap trinkets and sticking them on the things she wanted. If my MIL had not stopped her and checked, store security was watching and ready to pounce anyway.
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