I just did about 1500 miles on my 16ES, mostly in the mountains of Colorado and then returning to Phoenix. Man, I am blown away by the mileage I am getting! In my previous three FJRs I averaged about 46 mpg, but now I am getting 55 or even a touch higher. I thought maybe the average was being swayed by my conservative, early, riding on this new machine so I zeroed it out but it still came back to that type of reading. Now I am no hair-on-fire rider but neither am I timid. Can the sixth speed really have that magnitude of an effect? One more thing in the "Glad I bought it" column!