Gas Mileage question

[bkgee]

I just installed 2 pre-cat O2 sensors in mine this weekend. I bought them from Amazon. Below is the part number I used. They were 55.46 each.

2 Denso 234-4169 Oxygen Sensor (Air and Fuel Ratio Sensor)"
Automotive; $55.46

martin, I would be interested to hear if you see any fuel economy changes (up or down), as some others have noted on a separate thread that economy appeared to decrease initially, but none noted that it came back up...