DEF Questions..
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Cargo Master
Joined: Mar 2008
Posts: 2,975
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From: Archdale,N.C.
DEF Questions..
Hey gang. As I posted earlier we picked up a 2014 F250 Lariat 6.7. I understand that I should wait until the truck tells me there's x miles till empty. Is this correct? If so when it says x miles.. How much DEF will it hold? Thanks
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Correct. Fill the DEF when the truck goes into the mileage countdown. This helps prevent the system from becoming confused on whether or not it's full.
Once it reaches the countdown, it's going to take around 4.5 gallons give or take.
Once it reaches the countdown, it's going to take around 4.5 gallons give or take.
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
i generally fill mine with it is less than half full. I use the Ford DEF nozzle. This helps prevent over fill and DEF on the truck paint. Never have had a problem with the DEF resetting to Full almost immediately after filling.
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Cargo Master
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From: Archdale,N.C.
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Cargo Master
Joined: Feb 2015
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From: Livermore Ca.
No. The ford nozzle locks into the filler hole and won't come out like the one that comes in the jug. However after use I rinse mine out because DEF will crust up when dry and you dont want that in the tank. Get it at the dealer they are not that expensive. I keep mine in the bag and put that in the center console because I travel a lot and never know when I need to fill up.
6.7 Weight Loss
Joined: Jun 2017
Posts: 1,141
Likes: 5
From: Woodbury CT
I also wait till the 200 mile warning. I buy 2 5-gallon jugs from Ford which the truck takes a bit after I get the 200 mile warning. I also use the Ford filler tube.
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
The crusted DEF will re-dissolve when wet. It does not stay a crystal when liquid is added or wet by DEF.
You can buy the Ford DEF nozzle on eBay for like $6 with free shipping.
https://www.ebay.com/itm/PM27N-NOZZLE-ASY-Ford/302762375660?epid=1528890217&hash=item467e0b39ec%3 Ag%3AUUIAAOSw8lpZNp4j&_sop=15&_sacat=0&_nkw=pm-27n&_from=R40&rt=nc
Posting Guru
Joined: Aug 2007
Posts: 1,902
Likes: 26
From: BA, OK
I have a 2016 that might not have the issues like the earlier models do. I check the message center at fuel stops and when it reports "under half" I fill it up. Never had an issue with the truck complaining about no DEF in the tank.
Another interesting fact. I use Torque Pro to monitor my regens and noticed the last time I filled the DEF tank Torque Pro has been reporting 3.1 gallons in the tank. It has not changed in the last 1000 miles or so. I assume it will not change until one of the sensors reports it's lower than 3 gallons.
Another interesting fact. I use Torque Pro to monitor my regens and noticed the last time I filled the DEF tank Torque Pro has been reporting 3.1 gallons in the tank. It has not changed in the last 1000 miles or so. I assume it will not change until one of the sensors reports it's lower than 3 gallons.
Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
I have a 2016 that might not have the issues like the earlier models do. I check the message center at fuel stops and when it reports "under half" I fill it up. Never had an issue with the truck complaining about no DEF in the tank.
Another interesting fact. I use Torque Pro to monitor my regens and noticed the last time I filled the DEF tank Torque Pro has been reporting 3.1 gallons in the tank. It has not changed in the last 1000 miles or so. I assume it will not change until one of the sensors reports it's lower than 3 gallons.
Another interesting fact. I use Torque Pro to monitor my regens and noticed the last time I filled the DEF tank Torque Pro has been reporting 3.1 gallons in the tank. It has not changed in the last 1000 miles or so. I assume it will not change until one of the sensors reports it's lower than 3 gallons.
As your owner's manual states, the DEF is used at a varying rate depending on your usage of the truck such as, around town, cruising, towing or towing heavy.
