ORIGINAL: DarZeelon
EPA is a compound, specifically zinc dithiophosphate, added to some special lubricants, like camshaft assembly lube, to prevent scuffing and galling between parts, until they wear in, as is the case between a camshaft and its lifters.
Yes, I know about camshaft lube protecting the parts on initial start up until the engine has been run for 5 minutes at 2000 revs. But suggesting that some of this could stop a plug seating is a bit way out for me. Have you had hands on practical experience with this? Unfortunately I don't have any handy right now or I'd coat the threads and seat and try it out.