Driver for mileage

I have two 98 Imports (sorry). The 98 Civic gets a rock solid upper 30's all the time. You would have to try to get under 30. 150K on it and has been trouble free with the usual maintenence.

The other is a 98 Tacoma standard cab 4x4 4 cylinder. I have to try to get under 20. Regular is mid 20's. The smaller the tire the better the MPG. I am actually going smaller on the next set of tires. That is blasphemy for a 4x4 enthusiast, but I'll do it and drive the monster jeep when needed.

ROB