I did some searching but couldnt really find anything..................I changed plugs in my 98 Gt today and found surprises. Got a couple questions. First, 6 of the plugs were splitfires, and 2 of the plugs are what i am assuming are the original motorcraft plugs. ( the back 2 on the passenger side) Ive put over 30k miles on the car like this. It didnt seen to have any effects, but will something like this take life off the engine? And 2nd the 2 plugs that came out are motorcraft AWSF 32PG. The ones autozone gave me are AGSF 32FM Do I have the right plugs now? Thanks in advance.