let me reiterate what i said

o2 goes bad from extensive use or bad a/f mixtures

obviously the o2 is reading the a/f as it is sending a signal to the ecu saying the mixture is ______. The ecu is compensating then causing a lean or rich condition.

therefore by replacing the o2 you are skipping the source of the problem

that link is saying the same thing me and mtber said so I dont know why that link has anything to do with being stupid

stop arguing with people that are trying to help you

if you wanna be stubborn about it then just keep replacing your o2 sensor every 2 months