Just did my plugs this afternoon. They had 77k km's (don't know what that is in miles) on the factory plugs and wires (motorcraft platinums).
Put in champion coppers because i've always had good luck with them on fords and chryslers, and i'll just end up replacing them once a yr anyways (i believe cheap and new is better then expense old platinums).
I haven't liked platinum plugs on any car i've put them in, i thought my car was running good before, but the coppers were a pretty nice surprise. I'm sure that the autolites would be just as good.