turborich
Dedicated LVC Member
My Mark VIII has 114,000 miles on the origional spark plugs and wires. I decided to change them just because of the mileage. The plugs looked great for those miles! Still had the factory installed motorcraft platinums in it. I put new wires and platinum plugs back in and she still runs the same, as good as ever, No difference that I can tell as far as power gains. The motorcraft platinums are some darn good plugs!!! I hear a lot of talk about the plug threads being stripped out and oil leaking past the valve cover seals, the plugs came right out and went back in nice and smooth. I did use a tourqe wrench set at 15 ft pounds just to get them all evenly snug and some anti seize as well. No oil either, guess I got lucky! Over all a very easy job to do.