OK, this is an odd story but there is an answer at the end. When I first bought my '89 back in '94, I put Bosch platinum plugs and cheap wires from Pep Boys in- still runs like a champ(well, a champ with 245K on the odometer). Well, in '98, when I bought my '95, I did the same thing- ran like ****. Pulled the plugs and they had all kinds of oil fouling. Changed them and it ran fine for a couple of months then started stumbling again. Took it to 3 different shops in the course of 4 years, same problem plugs lasted 5 or 6 months at most then got oiled up again. Well, 6 months ago, I changed the wires to factory wires from Ford and swapped the plugs to, in hopes it would run good while I traded it- it runs like a dream now with no problems. Go figure...I say go with factory wires. Sorry for the story......LOL