If you use and get any  lead type anti-seize compound near or forward  (upstream)  of the o2 sensor, even a small amount will wipe it out. Try to always use copper anti-seize compound available at most flaps (friendly local auto parts store). 
   
  Hi Darrell,
  hey I've been wondering about the two types of anti-seize compounds... generally one is labeled copper and the other is not labeled... so the unspecified one is lead?

  besides the O2 use for copper anti-seize what other uses would be best served by using copper anti-seize?

  Thanks,

  Bill

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