WOW. Well thanks for posting that. Maybe I will document mine more carefully too. I am urging people to post their mileage on
http://www.fueleconomy.gov/
To go directly to the Aveo one, go here
http://www.fueleconomy.gov/feg/byclass.htm
To post your mileage, you have to become a member, so go here
http://www.fueleconomy.gov/mpg/MPG.do
Thanks for your reply :-/ just confirms the horrid news that this car gets shitty mileage for its size... so much for four cylinders.