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 just added DEF to my 2015 F350 for the first time.
Just under 5 gallons for 4400 miles.
I tow about 25% of the time.
Just under 5 gallons for 4400 miles.
I tow about 25% of the time.
