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Old 06-15-2017, 01:54 PM   #1
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What the DEF?

We were always boaters, and when we filled up with diesel there was no DEF to fool with. Now with our DP, we have to manage another fuel level. The local service centres in Canada that serve diesel may have jugs of DEF. We will be travelling south this winter and wonder where to purchase fluids. Any help would be appreciated.
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Old 06-15-2017, 02:00 PM   #2
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Don't use it myself, but have seen it at pumps at most truck stops. If not at pump they will sell it inside the stop.
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Old 06-15-2017, 02:10 PM   #3
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Yes, truck stops have it at the pumps usually. If not inside sell jugs of it. Also sold at Wal-Mart and other big retailers in the jugs. Price at the pump is the cheapest, and Wal-Mart I have heard is best price for the jugs.
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Old 06-15-2017, 02:10 PM   #4
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We were always boaters, and when we filled up with diesel there was no DEF to fool with. Now with our DP, we have to manage another fuel level. The local service centres in Canada that serve diesel may have jugs of DEF. We will be travelling south this winter and wonder where to purchase fluids. Any help would be appreciated.
Buy mine at Farm and Fleet. Always keep a "box" (2.5 gallon plastic jug inside) in Vehicle or 5er. You get plenty of notification that you're running low. Not a big deal or expensive thing...it lasts a long time as it doesn't burn at same rate a diesel fuel. My 3500HD Silverado has a 5 gallon tank.
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Old 06-15-2017, 02:51 PM   #5
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We will be travelling south this winter and wonder where to purchase fluids. Any help would be appreciated.
Just about any Wal Mart will carry both the Blue DEF brand and their own brand which at about $7.50 is around $4 per 2-1/2 gallon jug cheaper and it is certified to be just as good. Also, the Wal Mart brand is much easier to pour than the Blue DEF in their cardboard box container. As well, most truck stops will have it in pumps at an even cheaper price. My local truck stop has it in the pump for $1.99 per gallon. Most of the DEF engines will use about 2 gallons for each 100 gallons of diesel.
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Old 06-15-2017, 04:43 PM   #6
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In early 2011 I bought a new 1 ton duallie Ford. It was difficult back then and I tried to always keep a jug ahead. Truck stop pumps are now very common and it's also very easy to buy a jug if need be.
Noticing you are from 'up north', the only issue I ever had was during a visit to Ontario. It turned very cold and my system would not clear the low level alert even though I filled it. Thought I was going to have to rent some indoor parking somewhere to warm it up before it threw me into limp mode. Luckily it cleared itself before that happened. Otherwise trouble-free. My motorhome is an '11 but was built before the DEF systems started getting installed in my brand. I wouldn't have minded getting a DEF system at all, probably could be getting better mileage.
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Old 06-15-2017, 04:55 PM   #7
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Wal-Mart has DEF and you can spend the night in the parking lot...bonus
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Old 06-15-2017, 05:01 PM   #8
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In early 2011 I bought a new 1 ton duallie Ford. It was difficult back then and I tried to always keep a jug ahead. Truck stop pumps are now very common and it's also very easy to buy a jug if need be.
Noticing you are from 'up north', the only issue I ever had was during a visit to Ontario. It turned very cold and my system would not clear the low level alert even though I filled it. Thought I was going to have to rent some indoor parking somewhere to warm it up before it threw me into limp mode. Luckily it cleared itself before that happened. Otherwise trouble-free. My motorhome is an '11 but was built before the DEF systems started getting installed in my brand. I wouldn't have minded getting a DEF system at all, probably could be getting better mileage.
Maybe the heater for the DEF tank wasn't working or it was just too cold for it to be effective till driven for a while?
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Old 06-15-2017, 07:29 PM   #9
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Maybe the heater for the DEF tank wasn't working or it was just too cold for it to be effective till driven for a while?
Check out the DEF heaters..my 3500 Silverado HD has two and one went bad. 2013 and it was covered under a special gm warranty for that specific problem..all fixed.
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Old 06-15-2017, 07:31 PM   #10
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Truck stops, auto parts, Walmart, farm supply, etc. stick DEF. Walmart is cheapest for their house brand.

I carry a spare 2.5 gallon jug. When needed to refill the tank I buy a couple three more jugs, rotating a new one to be the spare. DEF has a shelf life of about one year.
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Old 06-17-2017, 05:53 AM   #11
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I go about 375 miles on a gallon. About 900 on 2.5 gallons. Truck stop bulk can be a pain, wrong side, have to reset pump, won't pump into jugs, etc. Walmart jugs easiest. About a buck more though.
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Old 06-17-2017, 07:27 AM   #12
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I have a DP that is too old to have DEF or any emissions. In Ontario Canada you can buy DEF at most automotive parts locations, Canadian tire, Parts Source, Walmart, Napa etc... It is part of our check list of stock items on construction site due to almost all rental equipment is now taking DEF. You do have to be aware that when it gets cold here, you will need to ensure your DEF heaters in the tank are working. Hopefully you are already down South in the warm weather.
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Old 06-18-2017, 09:06 PM   #13
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Buy mine at truck stop, only at big truck pumps though. After fueling I have wife pull forward as I watch for the compartment door where tank is and then I fill. When finished I pull coach forward and she goes inside to get receipt.
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Old 06-18-2017, 09:46 PM   #14
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.....just FYI, but DEF has a shelf life based on temperature it's stored at. At higher temps it can go bad in just a few months, at lower temps and no direct sunlight will last years.....

I have a chart on it I got from Cummins if I can find it, I'll put it here....
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