Autoblog got a chance to take the Airstream Interstate, a class b camper based on the Mercedes Sprinter van, for a 1000 mile extended weekend trip. With a family of four and their luggage aboard, the Interstate averaged 18.6 mpg during 70+ mph highway driving.
The Interstate as tested costs $142K new.
http://www.autoblog.com/2013/08/19/2013-airstream-interstate-3500-ext-review/
The Interstate as tested costs $142K new.
http://www.autoblog.com/2013/08/19/2013-airstream-interstate-3500-ext-review/