I have read a lot of threads about great gas mileage with the Prius C?? I have a 2012 Prius C with 3700 miles on it and am lucky if I get 45 MPG around town.. My old 2007 Prius wae getting 47 all the time. I am very dissappointed with this C. All of my driving is in the ECO mode and I live in Houston Texas with no hills and drive very conservatively. I don't understand why my mileage is so bad????