For milage comparison purposes, I recently rented a 1998 31' RV based on a E400 frame with a V10 gas engine. It got a whopping 8mpg during our week long trip. I could have probably gotten better milage if I hadn't tried to maintain 65mph on the freeways and over the Sierra Nevadas. -- J. Eric Townsend -- http://www.spies.com/jet