I just replaced my plugs and wires in my late 98 Zetec. A 95 to early 98 may differ...
I used Autolite Platinum Pro APP5364. The Platinum Pro are double platinums. They were about $3.50 (US) each.
I think a lot of people used to use Autolite APP5344 in the Zetec. But, I think Autolite is discontinuing the APP5344 and replacing it with the APP5364.
Two of the cylinders on a Zetec require double platinum. The other two cylinders can use single platinum plugs. The Zetec engine comes from Ford with 2 double platimum and 2 single platinum. Instead of using double platinums in all cylinders, Ford only used them in the two cylinders that needed them. I think this was Ford's way of saving a couple bucks per vehicle.
If you use double platinum plugs in all cylinders you will be ok. I used the double platinum in all 4 cylinders.
For wires I used Borg Warner at $25 per set. The Ford dealer wanted something like $65.
My car runs fine with the new plugs and wires.
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Reference
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APP5364 - Autolite Platinum Pro. - Double Platinum - Platinum on electrode and firing tip.
AP5364 - Autolite Platinum - Single Platinum - Platinum on firing tip only.
Plug Torque - 132 in-lbs (11 ft-lbs)
Gap - .050 inch
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98 Contour SE
ATX, Zetec
91,500 Miles
