Mine "uses" a littl oil too when I ride the highway, which is most of the time.
As a result, I usually run a 15/44 gear combitation. Typically, I may need to add 8 oz. once I have exceded 500 miles after an oil change. I just am in the habit of checking the oil when I return home after each ride. It does not seem as bad at lower speeds, say 60 MPH and does not smoke, so the consumption is relatively slight. Even the full-blown race XRR's needed to add oil during the Baja 1000. It is in the nature of the beast. FWIW, I am the third owner of this bike and have added over 7,000 miles so far on the stock top end.