rahjah

I have a 1992 S13 that is averaging between 13-15 MPG. The powertrain is stock (except for a K&N drop in filter), automatic with 180,000 miles. It runs great has plenty of power (for a Ka). I recenlty replaced the O2 sensor and all of the spark plugs. All cylinders all getting spark and fuel. I have searched and searched and the only things that I could come up with based on what I found online were to replace the O2 sensor and the engine coolant temperature sensor, which I did. So far nothing has helped. I a fairly long thread on Zilvia.net about fuel mileage and was unable to resolve my problem. If anyone has had this problem and fixed it I would love to know how. Thanks in advance.