We just got back from our first long trip in our 4wd HiHy. We went from NYC to the Berkshires in MA. Total trip was 390 miles, 27.5mpg, AC on 95% of the time.
The car was great. It charged up all of the steep highway grades at 65mph. What I was really impressed with was the local around town mpg. We got over 30mpg and the battery stayed at a high level of charge. This much better than my recent 20mpg around NYC. This car loves the mountains.