Congratulations... now you need to update your signiture... (like I should talk).
You should be able to expect 20-25 mpg, although you really never know. I know 'ol Blue would get anywhere from 22-26, 29.5 was the best I ever got. But Kara's truck, a 97 2.3L, 5spd, 2wd, extended cab only gets about 19-23, 27 I think was the best on our 4000 mile trip last summer.
Funny thing is... my '94 ext. cab, 3.0L v-6, 5spd, 2wd gets 22-25 city and 26-28 highway.
I've been enjoying the Ranger for several days now. The '88 is gone to a new home. I finally got around to updating the signiture!! I'm really hoping for upper 20's for gas mileage. The only problem so far is that the FM side of the aftermarket radio doesn't work. The good thing is that Ann bought me a new Sony radio that has hands free phone, and a jack for the mp3 player.