They should have Ford V10 if its a class C.
From what I read on this forum may times before ..... 10 MPG seems to be average. But most of the time that is at 65 mph avg speed.
I tend to run the speed limit (70 mph) so I struggle to get 10 mpg (well in the summer time im running the genny to keep the roof AC on). But I'm not loaded to compacity and I dont tow anything (Unless you count the Mtn bike on the back - LOL).
If no Genny on and running 65 I "think" I can get 11 MPG.
If you drop your speed to like 62 you might see 12?
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor