2023 DEF usage
Trailering
Joined: Feb 2018
Posts: 21
Likes: 4
I have a 2017 that doubles the DEF usage when towing a 33 foot 5th wheel. It has used a gallon in 300 miles when towing in mountains. Two dealers have said nothing wrong and have never heard of this issue....really!
Hotshot
Joined: Oct 2015
Posts: 19,686
Likes: 12,808
From: Wyoming
I don't know about doubling usage but my 2017 does use more DEF when towing. Hotter exhaust means more DEF.
More Turbo
Joined: Feb 2011
Posts: 708
Likes: 188
I could be wrong but previous year trucks may have had some issues with the DEF heater. I received advice to just don’t let it get really low. Never had a problem personally, so can’t say if it’s true or not.
More Turbo
Joined: Feb 2011
Posts: 708
Likes: 188
I have a 23 6.7 non HO. I’m coming from a 22 gasser. Just got done with a move from NM to FL and had a 20 mph headwind in NM/west TX pulling a 8K TT. I was getting low def ding notifications like crazy. Being my first diesel I thought it might be abnormal but I guess not after reading this. One plus of the side step is you can rest a jug on your knee when filling up. 😂
Tuned
Joined: Jun 2023
Posts: 306
Likes: 107
Anyone know offhand whether or not it will ever be possible to totally replace the EGR system and just run more DEF? My understanding is that they attempt to accomplish the same thing, less NOx. I read some vehicles are totally replacing the EGR by upsizing the SCR system.
Last edited by dp23; Jun 26, 2023 at 06:17 PM.
Fleet Mechanic
Joined: Jun 2015
Posts: 1,556
Likes: 878
From: Rome as it burns
Good GRIEF my 2023 450 regular 6.7 uses WAAAAAAAAAYYYYY more DEF than my 2019 350 6.7.
Even my KIDS are noticing that towing with it means we're bringing a couple boxes of DEF in the bed.
I rip off 250 miles with the toy hauler and the brain starts binging about needing DEF at some point in the future.
My 2019 didn't use ANYWHERE NEAR this much urea.
Even my KIDS are noticing that towing with it means we're bringing a couple boxes of DEF in the bed.
I rip off 250 miles with the toy hauler and the brain starts binging about needing DEF at some point in the future.
My 2019 didn't use ANYWHERE NEAR this much urea.
3rd Gear
Joined: Dec 2021
Posts: 3
Likes: 0
Excessive DEF usage.
I have a 2022 6.7 F350 with 15K miles on it
Note: It was ordered in Nov 2021 and delivered in Sept 2022
I just completed a 2500 mile trip and used 12 gallons of DEF.
This is not an acceptable usage rate.
My Previous 2017 and 2011 never had issues like this.
off to the dealer we go.
any thoughts out there?
I have a 2022 6.7 F350 with 15K miles on it
Note: It was ordered in Nov 2021 and delivered in Sept 2022
I just completed a 2500 mile trip and used 12 gallons of DEF.
This is not an acceptable usage rate.
My Previous 2017 and 2011 never had issues like this.
off to the dealer we go.
any thoughts out there?
Cargo Master
Joined: Oct 2019
Posts: 2,822
Likes: 1,183
From: Southeast MO
I believe I've said this before as others have too, they use more DEF but less EGR which I will take
that any day of the week.
that any day of the week.
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Fleet Mechanic
Joined: Jun 2015
Posts: 1,556
Likes: 878
From: Rome as it burns
Just out of curiosity, how did the consumers get to know this? Was this stated or printed somewhere by Ford?
Cargo Master
Joined: Oct 2019
Posts: 2,822
Likes: 1,183
From: Southeast MO
It's been awhile but I either read it or heard a Ford engineer talk about it.
Fleet Mechanic
Joined: Aug 2022
Posts: 1,576
Likes: 1,110
Good morning. We just got back from a 5000 mile trip. We weighed in at 22500 truck, truck camper and trailer. I used the TSD open roads card to be able to use the Loves truck fuel discount and the larger fueling areas.
Before the trip I noticed that I was useing 5 gallons of DEF for every 3000 miles of travel. My previous 6.7's used about 5 gallons every 5-6000 miles.
During our trip I kept getting the refill DEF message at about 1/2 a tank. Sure enough, every tank of fuel, about 35 gallons, I would have to fill up 2.5 gallons of DEF. This was consistent the whole trip.
Has anyone else had this elevated DEF usage? I pulled the DEF injector and it isn't covered in crystals. It will be going back to the dealer this week.
Before the trip I noticed that I was useing 5 gallons of DEF for every 3000 miles of travel. My previous 6.7's used about 5 gallons every 5-6000 miles.
During our trip I kept getting the refill DEF message at about 1/2 a tank. Sure enough, every tank of fuel, about 35 gallons, I would have to fill up 2.5 gallons of DEF. This was consistent the whole trip.
Has anyone else had this elevated DEF usage? I pulled the DEF injector and it isn't covered in crystals. It will be going back to the dealer this week.
Dave
Lead Driver
Joined: Nov 2005
Posts: 5,217
Likes: 4,221
From: Kaysville Utah
I use even less doing my daily commute. I just don't see hot EGTs on my daily drive.
Fleet Mechanic
Joined: Aug 2022
Posts: 1,576
Likes: 1,110
I can tell you right now that the answer will be: "usage depends on a host of parameters and will be different for every truck, owner, load, road, temperature, etc. etc. and therefore there is no guideline on what usage should be"......or other verbage with similar meaning. I predict they will do nothing.
Dave
