I have a comp G, so it's a GTP with 3.29 gears... my average is usually between 20-22mpg, but my daily drive home from work is up 2 mountains and through 2 towns with a bunch of stoplights. I cleared it over the summer at the beginning of a 3 hour all highway drive, and when I got home (6 hours on the interstate, cruising about 70, mostly flat), my average was 29. My old GT was about the same.
And yeah, as some have stated, I also got a GT first... not knowing the options out there... I spent time modding it and looking back I feel like it was wasted money.. though it was good experience for when I did get the GTP.
Spend some time looking on autotrader, do some haggling, you can get a GTP in decent shape for cheap and then have a higher starting point for any mods you wanna do. It's a lot more fun, and the whine is addictive, it catches people in their civics off guard when they get cocky!
