Goostoff wrote: Chevy C3500 with mildly built 454 gas, and 5 speed manual pulling 35' 5th wheel with 3 slides. I average 4 MPG. Needless to say we dont travel very far from home.
It is all a matter of choices. Some people want to "camp" with a high degree of comfort in something as big as a mobile home. That is not my choice. For my upcoming trip, I plan to travel about 15000 miles over a period of 3-4 months. I will see lots of National Parks and other great scenic areas with rarely even a week in one location. BTW I do keep the speed down to 65 mph or less and get roughly 12-13 mpg.
My 40,000# bus conversion with Detroit diesel Seties 60 engine gets 6.5 - 7 MPG. I travel at the speed limit (plus a few) up to 73-74 where I top out. The majority of our driving is Interstate as I am looking for more time at the destination than the travels.