I had a 1990 Geo Tracker 4X4. Bought it from my cousin. I remember the day I got it. I drove it around all afternoon and thought the gas gauge was broken because it never moved. I called my cousin and asked him if anything was wrong with it and he said no. So I filled it up and sure enough, the needle went up. I just had to get used to it after that. I 'think' I remember mine got in the upper 20's mpgs....but remember mine was 4X4 and had a much lower gear ratio than a 2wd would have. At 70 mph, the tachometer stayed around 4000 rpm while in 5th gear. Mine was a 5 speed manual tranny and I eventually put 30X12.5 mud tires and aluminum wheels on it. The stance was pretty mean looking. The 1.6L offered in that year model is an Isuzu engine and it ran very well for what it was. Can't go wrong with the removable/convertible top either. It was nice in the summer time. I almost miss it now.
If you STAY prepared, you don't have to GET prepared...