Welcome to the forum Womder!
Originally Posted by Womder
Have a Leisure Travel Wonder with the Diesel engine average 17 to 18. Lowest was 16 best 22. Average speed 65 to 70.
Great contribution on your first post.
AAFD, Womders Transit Diesel is a "B+" or "C" motor home with more weight and wind resistance than a standard Transit. Very good mileage based on his experience.