def usage pulling camper
Senior User
Joined: Sep 2012
Posts: 220
Likes: 1
From: Central TX
Posted a def usage history a few months ago. Search and compare to what you are experiencing. The time period included a 2 month period that was over 8k miles of towing. The last fill-up was done when system said I was around 400 miles too empty. Only would take slightly less than one 2 1/2 gal jug and it overflowed. Have never filled with def unless system reports less than 500 miles to empty.
Posting Guru
Joined: Dec 2015
Posts: 1,040
Likes: 9
I usually get 5000 miles or more between DEF refills, but more like 2500-3000 when towing. I filled last time after my CTS showed 66% for close to 800 miles. It took the whole jug and showed 99%, but was back down to 67% after a few hundred towing miles. Since my local NAPA had a sale in May for $8.99 for Peak, I picked up 3 jugs. Used another whole jug this time and it shows 100% so I didn't get it filled last time. And the readings are not at all accurate.
Freshman User
Joined: Mar 2002
Posts: 49
Likes: 0
From: Estes Park CO
With a 2011 Diesel and pulling a 16,000+ 5th wheel (c. 70% towing and c. 30% non-towing), I got about the following:
Used 8 gallons over 5,500 miles
687.50 Miles per Gallon of DEF
$0.00698 Cents: Cost per Mile----Hope my calculations are correct!
Used 8 gallons over 5,500 miles
687.50 Miles per Gallon of DEF
$0.00698 Cents: Cost per Mile----Hope my calculations are correct!
New User
Joined: May 2016
Posts: 22
Likes: 0
DEF and Flying J
I have been using the def on the pumps on the 18 wheeler side of the Flying Js a hell of a lot cheaper than buying it by the jug and a lot easier too. Wonder when the stations are going to install def at the RV pumps.
Posting Guru
Joined: Dec 2015
Posts: 1,040
Likes: 9
I haven't tried that because 1) I add one jug at a time which is often every few months so $9-12 just isn't a big deal and 2) I worry about the quality of it in a big underground storage tank and 3) some truck stops have it come from the same pump as the diesel which makes me question possible contamination.
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poodlemaster187
2017 - 2022 Super Duty
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May 10, 2017 05:46 PM
