I went east over Vail Pass and my 34' MH with toad went up the hill at 28 mph it is the first time I have done this is this what I should expect from my 2008 V10 Gasser?
Sounds about right to me? I traded my F350 V10 for the 6.7L diesel. Added 10-15 mph to the Vail Pass speed. Pulling a 30' 5th wheel with a Ford Explorer behind the 5th. V10 speed was similar to what the OP quoted.