With my Duramax diesel I got:
55 MPH - 13.75 mpg
60 MPH - 12.1 mpg
65 MPH - 10.9 mpg
70 MPH - 9.5 mpg
learned a lot that trip...
Very interesting. Those mileage stats pretty much mirror mine pulling a similar trailer (TT).
The pardette and I wanted to figure out if we went to larger trailer (like a 5ver version of what we have) what our fuel bite would be. Seems like your data suggests it would be very close (similar wind profile, weights actually close due to lighter materials and construction).
I really like the ScanGauge I just wonder if the diesel version is worth picking up a new one...
...We're getting just under 11mpg with our V6 F150 and 20' TT. It seems to me that the single biggest factor is wind resistance...I'm sure there are some skills in working the throttle to maximize efficiency...experiment with crusing along in overdrive or turning it off and letting the engine run at a higher rpm...We had a cg neighbor tell us that when he switched to a new truck with an ecoboost engine his mileage went waay up...
I concur with the other poster about the V8 being better in the V6/V8 gasser competition. There may be a number of factors that enhance that, like rear axle ratio.
Still in my TrailManor days, V8 F150s had much better MPG stats than my V6 Tacoma. A number of them were getting 3+ MPG better (according to forum mates) than I was. Still these are trailers that topped out at 5,000 pounds. F150s and Tacomas handle these loads rather well until you were up above 6,000 feet.
To me cruise control is your best friend. The problem is when you use these loads and go uphill cruise tends to over/undershoot since it is optimized for the truck lightly loaded.
One buddy is telling me that one company offers a cruise with a tow setting, which would certainly be nice. I spent a lot of time in the mountains compensating for the cruise control, and if the PID algorithm is good that would certainly help.
Diesels on cruise, handle this much better, and lot better than my Mark II foot can.
On some of the these lighter trucks I would be reluctant to run the truck on OD. What gets built into a 3/4 ton diesel is not what is built into 1/2 ton or less gasser. I doubt that advice applies across the board for 1/2 tons, but I am sure more than a few have a lighter tranny.
I really do recommend the ScanGauge since it will guide you to more economical operation in towing. Not only that, for some engines it also gives you a temperature reading for the transmission which is also a plus...