Originally Posted by DanH
As it happens, just last week I spoke to a Lycoming contact regarding the no-graphite prohibition in SI 1042AH. Can't share details (management likes everything vetted via official channels), but I can say the rationale would not apply to the interface between an auto plug and a brass or bronze adapter.
That said, I use copper base on the auto plug, and have seen no reason to quit. I'm not the only fella who ignores the NGK advice to install bare. For example, Honda specifies anti-seize for quite a few of their automobiles.
BTW, my bottle of antiseize dates back to VW beetles and airhead BMWs. Check out this instruction from a 1972 VW manual:
Iíd be really interested in what Lycoming says, if they ever decide to make it public.
Also, cool info from the VW manual! Wasnít in my version of the Hayes manual for my 74 superbeetle. I donít recall anything about plug thread lube/anti-seize in there. But, back then Iím not sure I knew what any of that stuff was.