If you put anything but a double platinum plug in the Duratec you will be changing them on a regular basis. (rear bank especially!)

Unfortunately that leaves NGK out of the running.

I originally threw them in the running because the engine type was Zetec.

Now if you have forced induction or nitrous I highly recommend NGK's laugh

I'm personally running Motorcraft AWSF22FS

2000 SVT #674 - Check it out!

Whoever coined the phrase; "If it ain't broke; don't fix it" ~ Just doesn't get it...