its all the modding these bastards do. it ruins your mpg's.
... and I thought it was the extra 60 lbs I was carrying around
When I bought my bike (carbed) it was running very rich and getting about 24 around town. I've yet to completely dial in the jets (after 4th time, I've lost a little wind from my take it apart/swap/dyno/rinse/repeat excercise) I now am getting closer to 33 city with a bump up to 40 for any highway trips (preferably non-slab).
And back on topic, worst offenders here in Sacto are at $4.75, but most are 10 cents less than that with Costco coming in nearly 20 cents cheaper.
Funny catch I recently discovered about myself. I was driving out of my way to find cheaper gas - only trouble was that I ended up burning between half and a whole gallon to do so. I may have saved $2 to fill up if I was lucky, but I spent that much or more to get there - not to mention the drive-time.