my CRX when I first got it (180k miles of low octane fuel, minimal maintanance, cheap everything) got 32-35 mpg. Running around town carefree (Because gas was $1.30 a gallong back then) I could get 28 mpg racing around.
With lots of work to the engine, which basically means freshening up and using only high octane, I have gotten 52 mpg out of a tank. But formulas have changed since 1998/99, so now it was getting 30 ish again under Captain Furhmann's command.
My new goal is 35-40mpg.