Minor correction. The chart below is 'as of 3/3/2012'
Since this is two months use, if I take these numbers and extrapolate them to a year, this is how much gas the various cars would burn:
Toyota Prius ~ 400 gallons
Chevy Cruze ~700 gallons
(displayed 750 gallon tank because I couldnt find a good 700)
ANY car that gets 22 MPG ~900 gallons (pictured is a 1000 gallon tank- couldnt find a good 900)