Digital Tuning Which Motorcraft Plugs For My '99 Gt?

Discussion in 'SN95 4.6L Mustang Tech' started by 99 FLA PONY GT, Aug 16, 2012.

  1. I have just turned 97,000+ miles and would like to do a tune-up @ 100K.
    I want to stick with Motorcraft plugs.
    What plugs came w/the car? Part#s?
    What's the difference between Platinum & Iridium and which performs better?
    Does Motorcraft make a Platinum and/or Iridium plug?
    If so please specify part#s.

    Thanks in advance.
  2. Stick with the factory motorcraft platinums. Some will say to get copper plugs d/t their hotter spark, but you'll never notice the difference. Iridium is an expensive plug and while they tend to last a long time and offer a good spark, again I don't think they're worth the money.

    Motorcraft platinum plugs should last 100K miles. AM sells them and if you send a PM to their StangNet rep you get a 6% forum discount.
  3. I suggest NGK TR6 if you are prepared to change them every year. Be sure you research changing them. On the surface its a simple job but there are a lot of details you need to get right. I have already posted them should be easy to find...
  5. Thanks,
    Do you know what the Motorcraft part# is for their Platinum plugs?