In Reply to: Re: Spark plugs posted by 36 coupe on November 13, 2017 at 06:27:15:
Guess what 36? Auto-Lite plugs are too. Read the fine print on the box. It also states "Designed In The USA". I would trust any Mexican made part over anything else today no matter if a sparkplug or a Fender Guitar -there is strict Quality Control whereas elsewhere (Cheena) there is none. I use both Auto-Lite 437's and Champion H12's in my N's with very good success, virtually identical in performance, and never had any fouling issues or otherwise. Fouling is probably due to a rich fuel mix...