Racine, a lot of the responses will vary depending on weight and engine size.
Our previous 2008 Monaco Dynasty at 40,039 lbs got about 7.9 mpg average over 69,700 miles (425 hp Cummins w/1,200 lb. ft or torque).
Our Liberty at 53,000 lbs. gets about 6.5 mpg average (500 hp Volvo w/1,750 lb. ft. of torque).
MM.