Time to tell the truth about Bosch plugs,Today I was on the phone with a rep. from Bosch, He was very considerate and listened to my story of spark plug dilemma of the DIYERS of this forum.He stated to me emphatically Bosch no LONGER MAKES A PLUG THAT IS NON RESISTER,so you do not have a choice of non resister plug from this company.I hope this will help you to make a selection from another manufacturer. The Auto zone people that sold me the plugs are getting an ear full from me and a letter to the head office,for telling a lie that could have damaged a very expensive part. Well I do hope that my former post on this will now stand corrected,And I do apologies for misleading any one.JNT