I haven't put a fuel log together yet, but I have been tracking my mileage for the month or so since I bought my '88 CRX DX Automatic. And after my most recent fill up it became obvious that I'm substantially above the EPA fuel mileage by a substantial margin. My model car had the lowest EPA ratings for that year, (29/32 I think, but I found revised numbers here
http://www.fueleconomy.gov/feg/bymake/Honda1988.shtml that put it at 26/33). But to date, I've been averaging 35-37 in the city and 43-46 on the highway; and that's been with a load of extra parts (even a spare transmission for a little while) in the back. I've confirmed that the odometer is correct on two long road trips, so I'm confident in the numbers. I do drive relatively conservatively most of the time, but I wouldn't have ever thought that it would make that much of a difference.
Needless to say I'm tickled, but I am curious. Is this a common phenomenon, or am I the exception here? The last owner of my car told me he got under 30 mpg in town and a little over on the highway; and I always thought that the epa numbers were widely accepted as being overly optimistic anyway....