My 1999 R1100R now has 86k + on the clock. Last weekend (actually 4 total days) I rode to Darlington, SC for the NASCAR Sprint Cup race and then to my Mom's north of Atlanta for Mothers Day, what a good son I am .
I rode 1,839 miles and used a total of 175 cc of oil. The bike ran outstanding! Almost every inch highway miles at an indicated 80 to 85 mph which works out to approximately 75 miles per hour. The ride home I clocked almost 725 miles in a 12 hour period.
And, because the question will probably be asked, I am using Mobil 1 V-Twin 20/50 Synthetic as my choice of lubricant. This is a recent change for me as I have only been a Mobil 1 fan for maybe 5k miles at this point. Prior to that I was using good ol' Castrol 20/50 petroleum. There is a noticeable difference in mechanical noise with the Mobil 1 and I am extremely pleased so far.
Please no oil wars... let's discuss proven oil consumption numbers for given miles driven might be interesting. Maybe that's already been done?