2001 Accord I4/AT winter gas mileage in CO

Hello. I wonder if the following is a reasonable estimate:

http://www.fueleconomy.gov/feg/findacar.htm shows that mileage for a
2001 Accord I4/AT should be 23 MPG City/30 MPG Highway, which coupled
with the oxygenated winter fuel we get here in Colorado and probably
less then optimal driving style should account for ~18-20 MPG the car is
currently getting. If someone thinks it's possible to do better then that
by doing some diagnostics/work on the car I'd really like to hear the
suggestions.

Thanks a lot,

Alex.

 

Given the mountains you may be driving and that winter
oxygenated fuel and winter lower engine efficiency alike may
be playing a role, you may not be able to do better.

The car has to be maintained properly (plugs and wires
changed per maintenance schedule, ignition timing checked
and adjusted as needed/appropriate (is your car
distributorless?), tires at correct or slightly higher
pressure, etc.) for optimum performance.

See http://home.earthlink.net/~honda.lioness/id11.html for
details.