A previous owner put in NGK WR 5 plugs. Not a common choise obviously. Finally I pulled them as the car was missing on idle some times. Found some oily residue around the threads, although the insulators & electodes were not obviously fouled. Car isn't driven a lot & seldom sees the highway. A couple of manuals & parts books refer to Autolite BF 82s for the Y. Is the Motorcraft BSF 82 C similar & likely to be satisfactory? Thanks


Paul