Brian,
Dont' be discouraged. Some, like me, will acknowledge a break-in period (first 1 or 2K). However upon reflection, it may have been more on driving style than the car. I experienced mid to high 30's for the first 1-2K.
There are many tips on this site - I've cut and pasted from another post I replied to on this topic. This is by no means definitive, but should get you started:
1) Check your tire pressure. I run mine at 40psi - others run up to the limit of the tire (if you have the Dunlops, it's 51 I think). This has helped anyone who has tried it.
2) Drive like you have no brakes (but always be safe
) - use the regenerative braking to do as much of your speed management as you can. Learn to look ahead at the traffic flow and coast when you can. Accelerate slowly, and take your time when stopping to get the most out of the recharge.
3) Use the econ button, and roll down the windows instead of A/C when practical.
4) Try to keep you speed constant up hills.
5) Keep reading this site - there are lots of great tips.
You'll find that your overall MPG will have as much to do with your driving technique as your car. Because mileage information is plentiful in a Civic, you'll become aware of things that disappeared into the noise on your other cars.
On the Auto Stop, there are some conditions that need to be met. In my 03 HCH, the temp has to be above 41 degrees. The car needs to be warmed up (won't engage until 5 min into a drive). The button has to be pushed (yes, this happens). You have to have traveled at least 10 miles per hour. If it's not auto stopping under those conditions, maybe you should have it checked.
Also, some environmental things:
- Obviously, A/C hurts your FE (you notice it more in this car)
- Rain, headwind, all work against FE (fuel efficiency)
- Temperature can hurt it at the extremes (hot and cold)
Good Luck! Glad you enjoy the car -