You know,.......this whole discussion,over FUEL MILEAGE.....,.. is rather Pointless....
If FUEL MILEAGE ... is what you want.....need,..Buy a Hybrd PRIUS.AND STAY IN HOTELS.:S
However....that has major limitations......(Most hotels have little sense of humor,when you build a campfire,to do smores..in the hallway)
So,really,what it comes down to,is.......WHICH DO YOU WANT. Gasser,with enough power....or Diesel, with torque ......power to spare???????
We ALL know,pulling our house down the road, isnt going to get us 30,40,50 mpg.