I have always used bosch platinum plugs thinks that bosch is good for fords, but while i was at the shop today autozone delivered some bosch plat plugs for them to put in another car that they were tuning up. as soon as the "master mechanic" saw them he said hell no take those back and bring back some NGK's because bosch plats misfire all he time. I have been using BP plugs in my t-bird for years but have always had some misfire problems. has anyone else had these problems with bosch plats? and i so what plug do you recommend for my 5.8? and same thing for my 3.8 t-bird?