Guys,
I just replaced mine last night. I've been doing a lot of driving lately and my mileage sucks. I've been getting around 17 mpg on the interstate, unloaded. Hopefully this will help. My truck has 136,xxx miles on it and the O2 sensor has never been changed. My nuts were rusted pretty bad too, but came off o.k......sometimes they itch a little....

Winkel


98 T100 SR5 4WD
Rhino Liner
Warn Hubs
Mostly Stock