Man, these are huge discrepencies from what I'm getting. It dosen't look like it's a large amount of mods that are making the difference. I drive mine like I stole it most of the time, but even still, that shouldn't count for a 8mpg loss would it? The car is two months old (haven't even had the first oil change), so I doubt there's something wrong or off-kilter that's messing it up.
I do the same thing as skylar, I use the sport-shift at red lights to come off the line faster and get away from all the traffic, and I use it for down-shifting when passing people, and pretty muce use it all the time actually. Does running at a lower gear but slightly higher rpms hurt gas mileage that much. Say, running in 4th at around 3k rpms instead of in 5th at 2-2.5k?
