I had a SWB '96 5-speed. Got 29-30 mpg regularly, 28 if I really abused it. 29" tires knocked it down to 27mpg tops, corrected.
Then got a 2003 SWB 5-speed new. Best it got on stock tires was 27 mpg. 29" tires knocked it down to 24 tops, corrected.
Then I put the 2.7 V6 w/ autmatic in it. 21 mpg tops, usually 19-20 (although 85mph into a strong headwind netted me about 14..). 29" tires only seemed to knock 1-2 mpg off, corrected.
I believe anyone telling you 28-30mpg for the Gen II is on crack, although I can only speak for the 2.0, not the 1.6 (I think it was available in '99?).