The gas tank holds 17.5 US Gallons. Premium gasoline only.
I've been averaging around 330 - 345 miles per tank of gas, with an even amount of city driving and interstate driving. I recently filled my car and was able to fill up my gas tank with 17 US gallons of premium gasoline.
345 miles / 17 Gallons = 20.2 MPG
But then again, I knew what I was getting myself into. If I was worred about gas mileage, I would have bought an ecomony car such as the Toyota Echo or Honda Insight.