Whenever I see a dashboard MPG I become very skeptical of course I'm speaking from experience from my 2005 Cummins. I only wish my overhead display was the truth, where my hand calculated MPG is 1.5 to 2 MPG less.
A 9.5 MPG towing with the 6.4 might make me consider going back to the gasser on the next purchase, but it will be hard to pull me away from my Cummins.
BTW I like the watercraft on top, 2 person kayak? I thought of doing something similar but my solar panels are in the way. Care to share how it's strapped down?