Just as there are "O2 sensor safe" gasket makers, there are also "O2
sensor safe" anti-siezes. Check the package. If it was made in the
last 10 years or so, and doesn't say "sensor safe", it probably isn't.
Before that, I believe the nickel and copper based ones were OK, but the
lead or zinc ones weren't. Unfortunately, many of them use a mixture,
and it's hard to tell.
James Babcock wrote:
> I thought so too until I replaced an O2 sensor. The new one came with
> a small amount of silver anti-seize on the threads and several parts
> guys said that it's the stuff to use.