DEF Mileage
4-25-2015. For anyone who is interested - I just posted an update on page 3 with my latest mpg after just refilling the DEF tank yesterday. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++...
Forum Discussion
I didn't watch mine closely but I think I used about 7 gallons in 4500.
2014 3500 Dodge
2014 3500 Dodge
