Picked up the unit from Freightliner this morning after a/c was fixed. Drove to Flying J and filled up. Since the last fill; drove 270 miles and put 29.099 gallons in the tank, 20 in passenger side tank 9 in the driver's side tank. The fuel gauge was showing slightly less than 1/2 full. Worked out to 9.3 mpg, most of which was pulling a 4 door Jeep Wrangler.
Seems ok, mpg should get better with more miles on the unit. FL tech couldn't tell me usable fuel in the tanks. Based on fuel gauge, maybe 60 gallons ?
2015 Seneca 37FS
2015 Wrangler Sport