Congrats on the new car! (I have a 07 Civic MT Sedan myself)
Random stuff that comes to mind:
- The floor mats wear out very quickly, so you may want to change them if you want to keep the ones it comes with in good condition. I didn't know this, and, 16000 miles and 1 year later, I have a pretty unsightly worn out spot where my right heel goes. Oh well, too late now, so I'll just keep 'em.
- As far as oil changes, my car takes ~4.25 quarts instead of the 3.9 listed in the manual. So if you change it yourself, you need to buy 5 quarts -- 4 won't do the job.
- You can pretty much follow the little maintenance minder built into the dash for when to do what, but it doesn't tell you to rotate your tires much, so you may want to just do that based on what the tire manufacturer says (for example, every 5000 miles)
- Keep the revs down until it warms up. You may also want to follow the break in instructions and don't beat on it too hard while you're breaking it in. There are different schools of thought on this...
- I'd remove any dealer decals before you can tell they were there. Maybe even have the dealer do this when you pick up the car?
- A silly tweak you can find at 8thcivic: You can get both the passenger and driver's door to unlock when shutting the car off so your passenger doesn't break his door trying to get out.
- Another silly tweak: You can set the defroster to light the AC light when it turns on so you can have the AC off and defroster on by hitting the AC button after turning on the defroster.
- This is purely _my_ experience, and I hate mentioning it for fear it will derail your thread, but if you notice idle is rough, try running 89 octane instead of 87. 87 _is_ fine for the car, though.
- the drive-by-wire throttle plays interesting games. There is a slight rev hang you'll just have to get used to. There is also a slight lag, so you may stall a few times because of it. But your foot will adjust.
- 8thcivic.com
All of the above are very minor things, though. Enjoy your car!