DEF Consumption Rate

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Feb 27, 2020 | 07:25 AM

#16

jbjones85

Senior User

Joined: Aug 2019

Posts: 173

Likes: 2

From: Raleigh, NC

first "fill" from the dealer lasted about 5500 before the 500 mile warning came on (80 daily use and 20% towing out ~4k camper), current tank is at 4K and showing just under 1/2, a bit more towing this time around (same camper).

Feb 28, 2020 | 05:07 AM

#17

BROWN DOG KTM

Fleet Mechanic

Joined: Oct 2011

Posts: 1,778

Likes: 287

From: Down SOUTH

How many gals of DEF does a 2019 F350 176” SRW hold ?

I’m at 5k miles after 15months & just under 1/2 tank

Feb 28, 2020 | 08:39 AM

#18

HRTKD

Hotshot

Joined: Oct 2015

Posts: 19,698

Likes: 12,825

From: Wyoming

Quote:

Originally Posted by BROWN DOG KTM

How many gals of DEF does a 2019 F350 176” SRW hold ?

I’m at 5k miles after 15months & just under 1/2 tank

2017+ tanks hold just about 7.5 gallons. If you want to get technical, the manual says it's actually 7.4.

Feb 29, 2020 | 06:28 AM

#19

Bearsixty7

Trailering

Joined: Jun 2006

Posts: 18

Likes: 1

Feb 29, 2020 | 10:47 PM

#20

JGORD

Senior User

Joined: Feb 2019

Posts: 142

Likes: 0

I just turned 13k miles and have about 3/8 left of my second tank since buying it new last January. Comes out to be close to 1100 miles per gallon of DEF. Only thing I've towed is the biggest U-haul trailer they have for about 150 miles or so back and forth when I moved. Tank wasn't completely empty when I filled it back up though so my math may be a bit conservative.

Mar 1, 2020 | 07:50 AM

#21

Logan1080

Freshman User

Joined: Nov 2016

Posts: 48

Likes: 0

My 2017 f350 when brand new was amazing on def. It burnt maybe 3/4 of the def tank in 7000 miles most of which was towing a 30 foot toy hauler. After that, the consumption went way way up, even when not towing. No idea why I was very annoyed. Deleted the def after that.

Mar 1, 2020 | 09:42 AM

#22

william_04_x

Lead Driver

Joined: Nov 2007

Posts: 5,139

Likes: 209

My 19 F350 3.55 CCSB seems to consume a bit more than average. Got my first 500 mile to empty warning with 2400 on the odometer. 750 of those miles were towing.

Mar 1, 2020 | 03:11 PM

#23

flumpydog

Mountain Pass

Joined: Nov 2018

Posts: 242

Likes: 22

Quote:

Originally Posted by william_04_x

My 19 F350 3.55 CCSB seems to consume a bit more than average. Got my first 500 mile to empty warning with 2400 on the odometer. 750 of those miles were towing.

That does seem a bit more than average. Maybe see how it does until it requires a refill again. I just had mine topped up as it had a half tank left, this was after driving roughly 12,000 km's (approx. 7,400 miles), with around 3,000 km's towing our travel trailer. I am quite happy with how little DEF my truck has been using. Most of my driving when not towing is highway, as we live out in the country.