I guess I ride like grandma. I often get 54 mpg with my '04 FJR -- always over 50 mpg. Admittedly this is from mostly leisurely rides on rural roads in the Southeast.
On the fuel gauge the 1st bar disappears at 42-46 miles, the 2nd bar at 79-82 miles, the 3rd bar at 120-125 miles, the 4th bar at 160-162 miles, the 5th bar at 200-205 miles, the 6th bar at 240-245 miles, the 7th bar at 268-274 miles, and the 8th bar starts blinking at 285-290 miles.
I keep the stock windshield at its lowest postion. I get into 5th gear very quickly and stay there. That's one of the main draws of the FJR for me -- it's fairly strong in the lower rpm's and I don't need to shift much. To me the FJR is a cruiser with a better engine and drivetrain, better suspension and handling, and better brakes.
I'm meticulous with the TBS syncing. I'm of the opinion this will help improve the MPG. I don't warm up the engine. I roll it out of the garage, hop on, start the engine while in 1st gear, and take off.