Hey guys, Newbie here.

Just pulled one out and it is a Bosch Super F8DC4, but NAPA and no one else in town has or has ever had this plug it appears.

McParts has Bosch Platinums +4 and +2's, NGK-BKR5EGP, Champion Coppers and Autolites.

I used the "search " feature and there is a lot of info about not using resistor plugs on a MB, not to use Platinum +4's or +2's because of poor idling and hard cold starts, Also read the Bosch has quit making non-resistor plugs. So where does that leave me?

So now I am really confused. What are you guys using in your S500's?