I have been kepping records for several years now, so when I got the bike, I started with 98 octane as that was what I used on the ZZR1100. After a couple of months, I tried standard ULP to see the difference. Well the difference was marked, in that the Ks per dollar went up using ULP, there was no difference in range, performance or Ks/litre, so have been using ULP since.
This year the furthest on a tank that I have done is 441.9Ks, using 24.36 litres. This equates to 23.4Ks per litre or 67.96 real MPG. The best calculated range to empty is 669Ks, with the light coming on at 549 Ks supposedly.
These distances actual and calculated are for a long distance run at 110-120Ks constant travel in open country, using 28 liters as the tank size, and 23liters for the light coming on.
One day I will pack a 5litre can and ride til I stop.