<<<<<Christopher Hoffman wrote: Michael, I'm not sure what I said that made you take such apparent personal offense at my trying to help out a new member by recommending a product that works well, but nothing so evidently irritating was intended. Just a hearty endorsement.>>>>>>>> Take it easy, Chris. Nothing in my post indicated any "personal offense". I just asked for technical, rather than anecdotal, reasons for the statement you made, "never, ever, ever, use Champions in a Mopar." As I said, I don't have any stake in Champion, or Autolite either for that matter. Don't use either that much. I still haven't seen anyone offer anything beyond the anecdotal. Sorry if my skepticism gets anyone's dander up. but I just find it hard to swallow that the combustion process in old Chrysler V8 engines is somehow different from that in other makes, in a way that fouls Champion plugs. I'd love to see an explanation of the mechanism for this, if it's a real phenomenon. I just haven't seen any evidence for it, if the plugs are of the correct heat range. Apologies for any offense, none was intended. Best regards Michael Roger and Michael in San Diego 67 Crown Convertible "Moby" 73 LeBaron Coupe "La Bomba Negra" 56 Sedan