Brewin,
That sounds like a sweet ride. I've got a '98 Civic hatchback. It's looking like I can pull about 40 MPG out of it in the near future, maybe more.
My goal is 50 (for now).
I'm not sure about ?OBD2 Downloads?
I know there are small units which plug into your OBDII computer which you can buy for $80-$150, or make for about $40-50. That's if you're looking for an active MPG readout. MPGuino is the self-made one, UltraGauge is the cheap pre-made one, and a ScanGauge II is the standard which most people around here seem to have.
I'm going with the UltraGauge.
You can buy the Scangauge II directly from here. Otherwise the UltraGauge is available from its own website, and an MPGuino is a do-it-yourself deal. Not sure where to buy parts and stuff for those.
Good luck
JMac