I picked up my Civic w/Nav on November 9th. I love, love, love this car! Here are my FE stats (I think I figured everything correctly):

11/11/06 Range:211 Gal:4.538 /4.538 OD:211 FE: 46.50 Life: 46.50
11/16/06 Range:377.3 Gal:8.067 /12.61 OD:600.9 FE: 46.77 Life: 47.65
11/22/06 Range:377.1 Gal:8.287 /20.89 OD:975.4 FE: 45.51 Life: 46.69
11/28/06 Range:404.2 Gal:7.915 /28.81 OD:1379 FE: 51.07 Life: 47.87
12/04/06 Range:365.8 Gal:7.168 /35.98 OD:1745 FE: 51.03 Life: 48.50
12/09/06 Range:288.9 Gal:6.137 /42.11 OD:2034.5 FE: 47.08 Life: 48.31
12/15/06 Range:424 Gal:7.942 /50.05 OD:2458.5 FE: 53.39 Life: 49.12
12/23/06 Range:453.8 Gal:8.825 /58.88 OD:2912.3 FE: 51.42 Life: 49.46
01/02/07 Range:379.6 Gal:7.791 /66.67 OD:3292 FE: 48.72 Life: 49.38

I did manual calculations. The FE was a few MPG higher than the readout.

Just a couple of little quirks with the car that I will have checked out. Any opinions would be appreciated.

-The car tracks straight, but the steering wheel is tilted slightly to the right when going straight.
-There is a strange croaking sound (only when the weather is warm) upon acceleration coming from where the door and dash touch. It sounds like opening the door to a haunted house- "CREEEEEK" (I took it to the service dept and, of course, it didn't make the sound. They did lubricate the hinges in the door.)
-The nav screen rattles on bumpy roads.
-The biggest issue is that I can't seem to wipe the grin off my face while driving...

 

There have been reports of cars delivered with alignment probs. They were fixed under warranty. If your having dealership probs for the creaks, I'd suggest trying another dealership.

As for the grin, I'm afraid you're stuck with it.

 

Welcome to GH. Be sure to enter your mileage/tanks in the database.

 

get it aligned asap, same thing happend to my 07.