[mwilliamshs]

Shuttle bus mileage is a horrible suggestion for comparison to what a motorhome owner might see. Shuttles idle for hours on end to keep their interiors warm or cool depending on climate/season and generally get driven hastily to airports or conferences to make up for clients running late. I've driven shuttles locally and have a friend who drives a ~150 mile loop in Texas to and from the Houston airport. He's had people board the van 30 minutes before take-off and 90 miles away, who offer him a couple hundred bucks to get them to the airport on-time...basically asking him to do in a 10,000 lb shuttle what couldn't be done in a Viper. Believe me, if a shuttle got 18 mpg it'd be a genuine miracle and if it did, a conscientious owner could expect 25 mpg...neither is gonna happen.