I am always talking about my '87 Prelude that I had from 2,000 to 2,004. I loved that car!
Is yours manual or automatic? Mine was a five-speed and I think that I usually got almost 30 MPG. I do not know what hypermiling techniques I used, although I did try pulse-and-glide, which I called "Leapfrogging" for a while.
I just could not tell a difference from tank-to-tank, so I am really glad that I have my Ultragauge now. No, you cannot just plug in an MPGuino, but I imagine that almost everybody here that installed one would recommend it.
I once went 600.2 miles on one tank. Granted, it was 15.9 gallons, but 37.75 MPG is pretty good for a car rated 22/29!
I recently saw a similar model, but it was an automatic. Part of the reason that I did not purchase it was that it was rated the same as my Forester, although now I see it rated higher, at 21/27.
Good luck!