I just had the the 3rd timing belt replacement on my 94 Accord LX and
noticed about 10-15 % lower gas milage after it though the car runs
smooth. I estimated this by noticing how many miles I could drive from a
full tank till the guage touches the Empty mark. It used to be around
330 miles, now it's around 290.

First I thought this might be due to perhaps a different, less efficient
gasoline mix they are selling during the winter season in my state, but
when I heard a Accord Ex owner on a local auto show calling in with
virtually the identical issue (lower milage after a timing belt change)
I started wondering if this is something more common. I's strange
because, if anything, I would expect a better milage after such a major
maintenance that includes a tune-up as well. The radio show host did not
really have a good answer and I wonder if any of you have heard about
this issue before.

KJ