MetalGator wrote:
We recently purchased a 2018 Miramar 35.3. It has the Ford V10 with the 6 speed transmission. I finally remembered to hit the trip odometer when I fueled on a recent trip. When I fueled again, I manually checked my mileage. On the 200+ mile trip, I got 8.1 MPG while towing our Jeep Wrangler. I was not running the generator and I was driving about 65-67 mph on flat terrain. The engine has just over 3000 miles on it. I was pleasantly surprised at this. I thought I would get 6.5-7mpg. I don't worry about milage but thought this was pretty good. When I used to tow my 30' trailer I would only get about 9.5-10mpg in the truck.
Burch
Actual mileage is most accurate using an on-board computer readout over a period of years and driving over all kinds of terrain.
If one is not built in from the factory, then something like a SILVERLEAF total coach monitor, is very popular. Using one of these will most likely put you closer to the numbers you first surmised.
The best way to decrease fuel consumption is to slow down and save on everything else in the process. Another way, is to stay a Wally World on occasion, which translates into money saved to buy fuel.