Try the list of things to check at
http://home.earthlink.net/~honda.lioness/id11.html.

Note especially commentary on cold weather effects.


"Myles" <anmpk@uaa.alaska.edu> wrote
>I bought a Honda civic hatchback about a month ago, and was
>getting
> about 40 mpg.
> I am now getting about 30 mpg and am not sure what is the
> cause.
> Other wise it is running fine.
> Any ideas as to what to check.
>
> Thanks
> Myles
>