I get around 45 to 48 mpg. I have 23000 miles on the Odo. My bike is a 2009, after the disastrous 2006 1200GT. I have the Estrada highway pegs that were just refurbished by Ken after 6 or so years. Cannot do without them on any ride over 2 hours. I am also 83 years young. @ years ago I took the bike down to Virginia for the famous Touring weekend. I also did a 10-day trip last year from New York on the super slabs to Virginia, then doing the Skyline and all the way to the tail of the dragon, Maggie valley etc. Loving the bike after 10 years of wonership.MPG... I must have the worst around, it's about 30 in town. I have a air temp "spoofer" (forget the brand) that tells the ECU it's 20 degrees cooler, that richens the mix. I put that on in an effort to control hot stall issues, while using 87 octane E10, now use 91 octane E10. I should take it off and see what happens, it cost 2-3 mpg when I first put it on a couple years ago.
Living on an island 20 miles by 30, and using the bike as a commuter (4.5 miles to work, 4.5 miles back) is likely the root of the mpg matter. I do get a minute at speed going home but the offramp comes up in only a mile, so it's not until the weekend I can stretch it out a bit with the significant other onboard. There are over a million peeps on this island and every one of them seems to be driving several cars at once.