Thats a tough ? roadbyte. You could let 2 or 3 diff. people drive that trk. , and they would prolly come up with diff. #'s. I have that same trk. with drw, and get anywhere from 17 to 21 mpg, depending on conditions and how I drive it. When new, I got about 14, 15, I have 32K+ on it now, and I think its still improving.
Larry