Thanks a lot for response.
My fault that I omitted all the details about my mini.
Mine is 6 speed manual. My first car was a manual and since then I just love driving a manual car. There's something about it that makes driving really fun.
I haven't checked gas consumption and mileage as detailed as you do. But I sort of had a same feeling that the gauge drops quicker after the first bar.
I hate wasting gas so I'm always trying to stay in the right gear and paying attention to engine sound to make sure I'm not to low/high, etc.
I tried CC around 45miles when I was driving around the neighborhood and because of traffic I couldn't do it so long. But I got the feeling gas ran out a little quicker than usual.
Just my thought, nothing proved...
Think it's important to know what I'm getting with gas when the cheapest gas price doesn't drop below $3/gallon! (sigh)