DEF Usage 2014 Tiffin Red with Cummins Diesel
Just got info for an RV tour to the Maritime Provinces in Canada. They advise that DEF at the pump is not readily available in some areas. I always just fill when I get down to a half a tank so am no...
Forum Discussion
Two Jayhawks wrote:
I have a 8.9L and I keep records. I use about one gallon for 280 miles.
I suspect yours would use less. How large is your DEF tank?
Very smart to keep records of this. It shocks me how many don't. It's simple enough to calculate w/fuel fills.
