If fuel economy is your thing......I think a moped or a Prius is more befitting!!!
Efficiency is a different animal. I get 9.6 litres/100km on a trip at 300rwkw. That was measured twice, once to the GC and back, and another time to Mt Gambier and back. I have no idea what I get around town, somewhere south......deep south probably, but who cares, town is town.
At the moment, a single tank has lasted for two months.....waiting for a part from japan before I can use it again