I get 300km on my Vee, that usually means I'm down to the last bar, 325km and the last bar starts flashing at me and I start worrying. I've calculated it out to be 37 - 38mpg if that helps any, I quit bothering since my riding is done for enjoyment and not as a primary means of travel.
V-Tom and myself have been on a few rides together, we usually keep a steady and healthy pace and I always have to stop for gas before him. I'm usually pretty consistant and might need gas at 290km or so riding with a old hooligan like V-Tom but it isn't too far off the 300km mark.
He teases me about my thirsty bike then I threaten to unleash all the pavement tearing ponies on him and he gets quiet and looks at the ground, kicks a bit of dirt around etc.
'07 KLX250S - Road
'00 CBR600F4 - Track
"The World is a book, and those who do not travel read only a page" - St. Augustine