Do I have to use Motorcraft spark plugs on my 2003 Ford Focus Duratec?

The Turk

New member
They're double platinum 100k plugs but $15/each and ONLY available from the dealer. Car's got 97k miles on it and I'll probably won't keep it more than a year or two. Isn't there a plug just as good and cheaper? Autolite?
One web site said Autolite 104s gapped to 60?
 
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