So on my way back to RIT with my car I followed close to the speed limit and managed a personal best mpg of 28mpg.
On the contrary, between a few short trips, a lot of hard accelerations, and maybe a few fast accelerations against another vehicle and about 85 high way miles (50 of which were with all windows down and above the speed limit), I pulled whooping 15.8mpg
On my bonneville, 14 on a bad O2. 22 for awhile, then it dropped to 18. I never had a higher or lower, it was always the same and I haven't the slightest clue as to why. Some tanks I would beat the **** outta my car, others I would baby it...it was always the same.
Cavi on the other hand...33 MPG...that was the only time I have had to fill it. That gas gauge goes down oh so slow