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Thread: DEF Question
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03-02-2019, 09:38 AM #1
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DEF Question
It seems to be cheaper to buy DEF at the pump versus a jug in our area.
Has anybody put DEF in any one of the plastic red, yellow, or blue containers and marked it DEF and carry it with you on a trip so you wouldn't have to worry about buying on the way?
Thanks.Allen & Denise
Ford F350 Lariat CC SRW SB 4x4 Diesel
2018 Solitude 310GK R
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03-02-2019, 09:47 AM #2
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Nope, I don't carry it with me. When my dash display shows 500 miles of DEF left I just go through the diesel islands and pump it in. I figure with all of the trucks using it at those pumps it will be fresh.
2022 Reflection150 226RK
2022 F150 Powerboost hybrid with 3.5L Ecoboost
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03-02-2019, 10:16 AM #3
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I don't carry it either, new F350's have a 7 something gallon tank and that last 5-6000 miles even towing. I just have it refilled at the dealer every oil change, too easy.
2019 Solitude 375RES Onan 5500 Splendide W/D Samsung res. fridge
2020 Ford F450 Platinum dually 6.7L 4:30 gears
B&W Companion for Ford puck system 20K lbs
Jeff
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03-02-2019, 10:47 AM #4
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When I bought my first diesel truck that used DEF, I bought a couple jugs of DEF to have on hand. I later learned that DEF has a limited shelf life so I stopped storing it and instead only buy a jug when my truck gets low. The system gives you plenty of warning. I know a lot of people buy DEF at truck stops but after looking at the DEF pumps there (usually filthy dirty), I choose to just buy jugs of Blue DEF and check the date codes to make sure it's fresh. IMO, DEF is cheap - even when buying the 2.5g jugs. Plus I don't want any chance of using contaminated DEF. I want to do everything I can to minimize the chance of a fuel system failure.
Last edited by bertschb; 03-02-2019 at 01:09 PM.
Brian & Kellie
2020 Solitude 310GK-R, FBP, 1,460w solar, 540ah BBGC3, MORryde IS w/disc brakes
2020 F-350 Platinum SRW Powerstroke Tremor, 60g TF fuel tank, Hensley BD3-F air bag hitch
Previous setups:
2019 Solitude 373FB-R, 2019 F-350 Platinum DRW Powerstroke, Hensley BD5 air bag hitch
2016 Reflection 318RST, 2016 GMC 3500 Denali SRW Duramax, Hensley BD3 air bag hitch
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03-02-2019, 11:48 AM #5
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Very good plan Brian, I'm the same way. I figure if I use only the Motorcraft stuff and their 5W40 synthetic oil and only Shell diesel I should be good if an issue comes up. To me its really not that hard to maintain these new diesels and man are they worth it when they lean into a load going up a hill lol!
2019 Solitude 375RES Onan 5500 Splendide W/D Samsung res. fridge
2020 Ford F450 Platinum dually 6.7L 4:30 gears
B&W Companion for Ford puck system 20K lbs
Jeff
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03-02-2019, 11:55 AM #6
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I tried using the truck stop DEF pump once. The nozzle it almost too large to fit and the flow rate is so high it made quite a back flow mess when the tank got full.
I do scoff at the markup of the 2.5 gallon boxes compared to the truck stop price, but the Walmart brand is not too bad.
Sent from my Pixel 3 XL using Tapatalk2017 Solitude 377MBS
2018 Ram 2500 with diesel and air assist suspension.
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03-02-2019, 11:56 AM #7
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First time I read about DEF-related issues was this thread: https://www.mygrandrv.com/fo...d-System-Fault
I bought the Refractometer suggested by @LVNaturalist. It's kept in the truck. I buy the inexpensive WalMart DEF and test every single jug before it's poured into the DEF tank.
It's been mentioned many times and that linked thread is a perfect example--it can be tough on the wallet reading this forum!2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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03-02-2019, 01:38 PM #8
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Chris & Karen
Fort Collins, CO
2017 F-350 SRW 6.7 Lariat Value CC LB 4x4
2018 Solitude 310GK - Sold 7/2023
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03-02-2019, 02:12 PM #9
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2019 Solitude 375RES Onan 5500 Splendide W/D Samsung res. fridge
2020 Ford F450 Platinum dually 6.7L 4:30 gears
B&W Companion for Ford puck system 20K lbs
Jeff
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03-02-2019, 02:13 PM #10
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Brian & Kellie
2020 Solitude 310GK-R, FBP, 1,460w solar, 540ah BBGC3, MORryde IS w/disc brakes
2020 F-350 Platinum SRW Powerstroke Tremor, 60g TF fuel tank, Hensley BD3-F air bag hitch
Previous setups:
2019 Solitude 373FB-R, 2019 F-350 Platinum DRW Powerstroke, Hensley BD5 air bag hitch
2016 Reflection 318RST, 2016 GMC 3500 Denali SRW Duramax, Hensley BD3 air bag hitch
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