I wonder if she was using the dashboard computer for her mileage numbers. I'm over on the cbr500 riders forum too, and the consensus is that the dash is very conservative...by 20% on avg. I just filled up my F...217.9 miles, 3.114 gallons used = 69.97 mpg carrying my big bag of bones. It has a 4.15 gal. tank, so I theoretically could have made 290 miles! It would do better I'm sure with that little girl riding it.