Typical Fuel Mileage You Get With Your Gas or Diesel Class A

First post on the forum. Itasca Suncruiser 33', Ford V10. 22,000 lb GVWR. I tow a Toyota Yaris 2-door weighing 2,300 lb. I drove from Washington DC area West, across the Appalacians, across the USA, across the Rockies to Yellowstone, then down to Salt Lake City, and back home. 5,000 miles, all of it towing. Average 8.1 MPG. Will do another trip this coming summer up North. With the MH broken in a bit maybe we'll get better mileage. I usually drive just below 60 MPH.