I just refilled my first gas tank on the first beep of the last bar: - Computer said 49.7 MPG - My basic math is 50.8 MPG I'm driving 2/3 freeway and 1/3 city so I'm kind of low of 53 MPG in city as stated from manufacture. I got the same 2 weeks period to refill my 1997 Toyota Avalon with 16 gallons and 370 miles, meaning I'm driving more, but don't know I save a lot from buying my C4 or not. The way I'm driving is pissing a lot of people behind me: from stop to speed limit either in the city or on the freeway I always manage to see the odometer counting from 1 and not skipping any number and driving at speed of 55 on freeway. And always shift to Neutral when I see the traffic light ahead turns yellow to reach the intersection. Switching from ECO to NORMAL doesn't change anything. My tires pressure are 43/41. What else do I need to do to improve mileage?