half a tank of gas, cruizin at 3100 rpms, lean as all hell. as in 18+ a/f no more then 1/4 throttle at any point in time. i could be wrong, but i know it was at least 30 - 32 mpg
14 / 2 = 7
7 gallons divided by around 220-225 miles driven.
severely babied the car. it IS possible im not saying its a safe way of doing it, but you can do it.
temperature plays hell with my carbs here in missouri. one day it's great mpg, or runs great, the next day it's sucking down fuel