Originally posted by LocoGSR:
Don't need to replace them with the same ones....I have used just about every plug available for the Zetec.

As far as sequence I just went down the line.

As for the torque.....I just tightened until snug.....never had a problem the whole 140k miles.

2 things to have that are handy are a 12" socket extension and a spark plug socket.



So, what spark plugs should I use? There must be a reason that they have two different part numbers?