May 19 to 22, 2016 VA, NC, and WV

 Stats:            LK R12    TL R12
5/19/2016          65          70 mph
                          48          49 mpg
                        270.6            miles
5/20/16              48           45 mph
                          49           50 mpg
                        350.3             miles
5/21/16              39           37 mph
                          52           52 mpg
                        309.5             miles
5/22/16              54                mph
                          50                mpg
                        495.4             miles
GPS:  1424.70 Total Miles
LK Data from Day 1 starts at home including the ride to Lowes; TL data starts at Lowes.
Gas mileage record fill-by-fill shows conclusively that the biggest source of error in measuring gas mileage is the consistency of defining "full" at each fill up.  The variation can be as much as +/- 0.2 gal.  Over the course of 1212 miles of this trip, overall gas mileage was 50.19 for LK R1200R and 50.02 for TL R1200R, but LK's last fill was "heavy" by about 0.07 gal which just about exactly accounts for the difference.  Looks like the 2 bikes got essentially identical gas mileage at 50 mpg.  Both bikes reported preferring the NC No Ethanol gas (52 mpg from the on-board computers on 5/21) but LK's poor filling consistency on these fill ups (one very heavy, one very light) makes it impossible to extract more meaningful statistical data from the record.  Guess we'll have to go back and try again!