Well my F6B is 6 days old and I went on my first long trip this weekend with it. Rode from the Dayton Ohio area down to Dale Hollow lake in Tenn. I kept track of the miles on both trip meters and would fill the bike back up around 200 miles or so, was still showing about 1/4 tank left. Average fill up at those time was just over 4 gallons. Total trip miles was 611.5 and the bike used a grand total of 10.86 gallons for an overall mileage of 56.3 mpg's!! That's incredible!