For several months now I have been using Bosch paltinum plugs. Regular stuff, not 4+. So far no problems. I will keep an eye on them for the following months just to be on the safe side. NGK's are really expensive here (like 65$ for a set of six) and hard to come buy. We have Ford dealership coming to Sarajevo this fall so maybe I can get some Motorcraft (I gues I can order it too but I am being lazy) just to be sure. I firmly believe in OEM for a non-moded engine. If one does the mods, well everything is a fair game then.
