DEF
Posting Guru
Joined: Jun 2018
Posts: 1,366
Likes: 186
From: Frederick, CO
4,250 miles, +/- 250 miles. I've had 2 refills so far and they've been eerily similar to one another in terms of miles driven.
I was towing quite a bit during these 9,000-ish miles. I won't tow a bit during the winter. So, we'll see if there's any difference to my DEF consumption.
I was towing quite a bit during these 9,000-ish miles. I won't tow a bit during the winter. So, we'll see if there's any difference to my DEF consumption.
More Turbo
Joined: Apr 2017
Posts: 736
Likes: 225
Like another member posted, about 1000 miles per 1 gallon of DEF while not towing. I add 2 1/2 gallons every 2500 miles when the DEF shows about 1/2 tank. It is also my reminder to check the water separator.
Posting Guru
Joined: Jun 2018
Posts: 1,366
Likes: 186
From: Frederick, CO
Same here. Walmart can't hardly keep this stuff in stock around here. I would love to see an environmental trade-off analysis done between untreated diesel exhaust and the manufacture, storage, and transport of DEF (including the manufacture and disposal of the massively thick plastic containers).
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Mountain Pass
Joined: Nov 2018
Posts: 221
Likes: 10
From: Manitoba, Canada
Same here. Walmart can't hardly keep this stuff in stock around here. I would love to see an environmental trade-off analysis done between untreated diesel exhaust and the manufacture, storage, and transport of DEF (including the manufacture and disposal of the massively thick plastic containers).
Tuned
Joined: Jul 2009
Posts: 393
Likes: 18
From: Irving
I record 600-800 miles per gallon of DEF around town and regular highway, 1,600 miles per gallon of DEF while hauling a 14K lb fifth wheel at highways speeds.
Senior User
Joined: Sep 2017
Posts: 493
Likes: 5
I "mail order" Ford/Motorcraft DEF. I've heard about some finger pointing to DEF contributing to a failure. The Motorcraft DEF is pricey, but I don't use a lot and don't care for hassles with service writer.
I use about 1 gallon/1000 miles +/-...so maybe 6 gallons per year for me.
I use about 1 gallon/1000 miles +/-...so maybe 6 gallons per year for me.
New User
Joined: Apr 2018
Posts: 5
Likes: 0
From: Colorado
My son-in-law, on their first camping trip with the family, filled up with DEF at a truck stop. A few miles down the road, and they were getting the check engine light and were going to be in limp mode shortly. They made it to a campground close by, and took the truck to a dealer. The verdict was bad DEF. And so soon after hitting the road! Clearly, not all truck stops can be trusted for DEF.
Mountain Pass
Joined: Dec 2018
Posts: 193
Likes: 15
From: Fort Collins
Gotta pay for those plastic jugs and cardboard!
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