I replaced my car's plugs yesterday (no running problems, just time
to replace them) and all four of them had a slight greenish-yellow
tint on them. They didn't look "steam cleaned" and had a normal
amount of carbon deposits on them. Should I still worry that this
is antifreeze? I thought that a blown headgasket affects some
cylinders more than others.


Could the green tint be due to some sort of oxidation? When I put
the plugs in, I recall using a bit of copper antiseize - I know
that corroded copper is green in color.

TIA,
-b.