Right now i'm between 30-35mpg (around what you're getting), i have pretty decent amount of in town driving in the morning though.
Thanks to this site though, I'll be changing those and we'll see what kind of mileage I get now
I need to get one of those plug in trackers everyone has been talking about to see my solid numbers.
You are lucky you have a 98'. They had slightly shorter gearing in 1998 and the transmissions were actually stronger, in 1999.5 (the early 99 was basically the same) they moved up to new internals and went off of more mazda parts, in fact, I think it's technically a mazda transmission. If you take care of it then it should last a very long time.