2000 f250 V10, ext cab short box with a canopy. Automatic with OD. Highest ever 14 MPG empty, hilly ground NE wahsington?

Lowest 8mph, headed to Wash coast for vacation, cruise set at 70, bad head wind towing 24' catalina trailer loaded.

Daily driving 13, normal trips with trailer we count on 10 but get surprised with 12 sometimes. Trialers weighs 7100 empty I think.

We were using my 89 F150 300 6 to tow the trailer. It was maxed out. This V10 250 was heaven sent for us and our vacations. Problem is the wife latched on to it and vacations and a few Scout trips are the only time I drive it. I have been using the old 150 for all the fire wood and etc. since 98. 135K on it, it still gets 18MPH but she 's getting rough around the edges. My new 08 250 Crew long box V10 arrives maybe Valtentines day. It's my turn. I can only hope it will be as good as the 150 and 250 we have and the 3 other Fords I have owned.