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Old 02-10-2021, 09:31 PM   #21
BigBobIa
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Thanks. I will not care until it gets above freezing for a couple days.
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Old 02-11-2021, 06:00 AM   #22
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Originally Posted by BigBobIa View Post
Can DEF freeze? Gauge read quarter tank. Added 4+ gallons and gauge did not move driving 5 miles home. High around +10f today. (-11 this morning)
Your truck is equipped with a DEF tank heater. If the tank heater fails you will get a code (check engine light). The one in my Ford failed a couple of years ago but Ford was aware they had a problem and they covered it.
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Old 02-11-2021, 06:17 AM   #23
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https://www.powerblanket.com/blog/de...-cold-weather/
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Old 02-11-2021, 06:19 AM   #24
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Revrusty you are confusing people by referring to blue def. It should simply be called def. Blue def is a brand name.
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Old 02-11-2021, 06:35 AM   #25
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I am sorry if I am confusing people. I clearly stated that I am no expert. However as others in this thread have also mentioned. You can by blue def made by several companies including peak, walmart (according to someone in this thread) and others. So I guess in my ignorant way I am trying to get info out that you can apparently by the blue def brand from different manufacturers. I thought those were brands. Sorry about the confusion.

I just googled blue def engine problems and info came up about buying lower quality blue def. I believe there are differences in quality among the providers of blue def.

Again, I appreciate all the input here. The last thing I intend is to confuse anyone. I stay confused enough for everyone! I had a problem, and just wanted to give others a heads up. I am glad so few others on this forum have had a problem. If I ever get my truck back, I am still going with the peak company blue def at the recommendation of my mechanic. Happy travelling to everyone.

Oh, let me clarify the part about getting my truck back. The day after the mechanic started on my truck, he got Covid and had to quarantine for 2 weeks. Just got back to work a couple days ago.
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Old 02-11-2021, 06:43 AM   #26
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https://www.dieselarmy.com/engine-te...exhaust-fluid/

DEF is a product... BLUE DEF is a brand name manufactured by PEAK ...
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Old 02-11-2021, 07:13 AM   #27
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Quote:
Originally Posted by Javi View Post
https://www.dieselarmy.com/engine-te...exhaust-fluid/

DEF is a product... BLUE DEF is a brand name manufactured by PEAK ...
The latest "You can by blue def"
It is just harder to get through to some people...
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Old 02-11-2021, 07:19 AM   #28
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See told you I was confused.

As I continue researching, I find that there are boxes of Blue def that are labeled by peak and others that are not. When I purchased four 2 1/2 gal. containers at a local store the other day, peak was on one shelf and containers with no major maker were on another . Both said Blue Def so maybe Peak makes it for others with no label or something?

truckinginfo.com mentions problems with low quality def. Maybe I got some at a truckstop pump. Maybe I ignorantly used some that was old, or past shelf life. Maybe I got some extra crystals from the nozzle. Maybe I am just that lucky!!
At any rate, I have learned about checking on the freshness or use by date, which seems to be about 6 months. I just hope this thread may help someone else avoid the problem I have. Thats what makes this forum so great.

If y'all ever have any questions about honey bees or growing mushrooms, I will be able to contribute some quality info. For right now, I continue my education on camping, TT's and tow vehicles. Thanks again for all the input.

And now that I think of it, maybe the diesel shop people meant that blue def was quality product as compared to other def products.

Hey I might be slightly less confused than I was a few minutes ago!
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Old 02-11-2021, 07:24 AM   #29
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A question about the Peak Blue DEF boxes. I have read and heard on here they have a date on the box. I have checked for that and never found it. Just spent some time checking again on a box. It has a stamped code with letters and followed by numbers, but does not follow any date coding that I know of. It reads coz4079054.
I have been using that or Ford DEF. I think the Ford DEF had a date that was easy to read. What I found with the Ford was in Portland, the dealers prices when from 20 bucks to 9 bucks per 2.5 container. So, mostly I get Peak Blue DEF while shopping at Walmart or Bimart for under 10. When at a Ford dealer I ask first how much before buying.
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Old 02-11-2021, 07:38 AM   #30
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See told you I was confused.

And now that I think of it, maybe the diesel shop people meant that blue def was quality product as compared to other def products.

Hey I might be slightly less confused than I was a few minutes ago!
Yes, that is what your mechanic was saying. He feels that Blue Def is a good brand and that other brands of def may not be as good. Most people agree that Blue Def, sold by Peak, is a good product.
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Old 02-11-2021, 10:46 AM   #31
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Lol Ive been trying to follow this thread
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Old 02-11-2021, 11:59 AM   #32
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I would like to throw this into the mix. Perhaps because you are in a smaller area and all the problem seem to be in same area , someone that is selling DEF has thinned it with more water to make more money? That being said, here in Canada I was in buying some DEF from a local place and a guy came up to me and said. "Don't buy that here! Go to a truckers supply place it's less then half that price" I had thought price was good , was on sale. LOL Went to truck supply store , under half the price in sealed boxes of two jugs .
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Old 02-11-2021, 12:01 PM   #33
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Originally Posted by Ken / Claudia View Post
A question about the Peak Blue DEF boxes. I have read and heard on here they have a date on the box. I have checked for that and never found it. Just spent some time checking again on a box. It has a stamped code with letters and followed by numbers, but does not follow any date coding that I know of. It reads coz4079054.
I have been using that or Ford DEF. I think the Ford DEF had a date that was easy to read. What I found with the Ford was in Portland, the dealers prices when from 20 bucks to 9 bucks per 2.5 container. So, mostly I get Peak Blue DEF while shopping at Walmart or Bimart for under 10. When at a Ford dealer I ask first how much before buying.
Easier than typing it

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Old 02-11-2021, 12:02 PM   #34
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I mean the nozzle on the dispensing tank they use. Apparently they see crystals forming on that and wipe it with a rag or something. Not sure how they clean it, my friend just said they do.
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Old 02-11-2021, 12:05 PM   #35
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My last post is about the question on the bulldozers having issues. Also I travel each fall from Virginia to Montana to bird hunt while pulling my camper and last year all the way to Oregon so I have bought at least a little def from one end of the country to the other.
Thanks to all.
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Old 02-11-2021, 12:21 PM   #36
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DEF does have a shelf life & you should find a date stamp on the jug similar to a gallon of milk, always buy the freshest.
This here is spot on advice with what the OP says he does with his truck. I am in a similar situation, 2014 Ram Cummins that only hauls the camper. I say on average we have put 2000 miles on for the last few years (yes the 2014 has 12300 miles). I have made it a habit to buy the freshest jug of DEF in the spring just before we start camping. I only put about a Gallon in and then keep the rest in the somewhat temperature controlled garage. I make sure towards the end of the year to have the def almost ran out. Truck currently says 50 miles til limited to 15 MPH until DEF is filled. That is just the way it will stay as it sits in winter hibernation. When she gets awoke in a few months I will add a gallon or so to keep the truck running for the year. I dispose of the unused gallon or so, not worth the price of the repair bill. SO far Wisconsin doesn't have emission inspections, if I ever have emission problems after warranty somehow the parts will fall off the truck before paying an expensive repair bill. Emission warranty is 8 years or 80,000 miles, i have a few years left.
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Old 02-11-2021, 04:12 PM   #37
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Thanks Javi, learning to to read the code was good. Current jug has the ink mostly unreadable, but what would make sense is it is year code 21 not z4.
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Old 02-12-2021, 02:16 PM   #38
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Just thought I would look at the Walmart site to see how many other BLUE def products they carry, and as hard as I tried. I can only see the Peak brand that is called BLUE DEF.
https://www.walmart.com/search/?query=def
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Old 02-12-2021, 06:51 PM   #39
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Today I found a new to me, Sky Blue DEF made by Lubriguard sold at D&B supply. I did not buy any, 7 bucks a gal. not the 2.5 size.
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Old 02-15-2021, 05:41 PM   #40
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Can DEF freeze? Gauge read quarter tank. Added 4+ gallons and gauge did not move driving 5 miles home. High around +10f today. (-11 this morning)
yes, it freezes arounf -10C . that is the only problem I have ever had with my system... I was stupid and filled it to the brim in the winter, it froze and cracked the heater element housing and threw a code. would have been a 1500 buck repair from ford but I did it myself for 360.00

i use what ever def is on sale, it is rare I get blue but some times, I use truck stop bulk if I can in the summer (to easy to overfill the tank in the winter) as it is much much cheeper. evey def if you spill it as it drys out it will form white crystals , but I have never heard of the crystals in the solution causing a problem, you would thing with the heated tank and the agatation they would just redesolve as it isnt a saturated solution.

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