This thread is GREAT! I have been stuck at the airport for several hours and needed to kill some time and this thread was just the ticket. I read every post and found it highly entertaining.
I decided on a a new gasser due to the substantial savings over a diesel. I will have no problem slapping the peddle to the floor and keeping it there all the way up the mountain. All of these engines, not limited to diesel, will last longer than most people think and could very well outlive the motorhome itself.
I do find it interesting the most gas motorhomes are limited to towing 5000 pounds but when you look at the Ford website the F-53 chassis is rated up to 6000 or 6500 depending on wheelbase and GVWR.