Congrats on the purchase - owned a '89 CRX si what seems like forever ago, have lots of fond memories of that car.. Wish I still owned it today.
In high school, my friend owned the '85 carb'ed version, it got crazy gas mileage (for mid eighties), over 40mpg consistently, not that he used any hypermile techniques while driving..
Looking forward to hear of your experience w/ the CRX.