I'm wondering if my mpg will improve as the mileage on engine increases? My 31' weighs in at 13986. It's a 2011 with 7000 miles on it now. The best mpg so far has been 7.6. Babying it from Maine to C...
If you calculate city at 6 mpg and freeways at 9 mpg average, speed is between 55 mph and about 65 mph, on a 55 gallon tank you will see about 350 to 400 miles of travell depending on terrain and wind direction.
You have to remember that you have a big frontal dam in front and it takes fuel to move forward at speed, the higher the speed the more energy that the engine has to produce to move the RV and that translates to higher gas consumption.