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Thread: Denso Iridium plugs. Yay or nay? Reply to Thread
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Topic Review (Newest First)
09-25-2012 04:56 AM
Blue5ive Motorcraft AZFS22C part # 463 is the copper. If you go in most places asking for SP-463 or 463 plugs they will have no idea what you're talking about. It throws people off when 463 is the only info given them.
09-25-2012 03:50 AM
Andrews-bad-SE
Quote:
Originally Posted by Gobliz View Post
EDIT: BEWARE When you go to an auto parts store as I did and tell them SP-463 they may hand you plat tips. They did to me :( Can't afford 12$ right now to replace so... it for now


Haha thanks for the heads up guys! Im never unsatisfied when i come here for advice.
09-24-2012 12:04 PM
Gobliz EDIT: BEWARE When you go to an auto parts store as I did and tell them SP-463 they may hand you plat tips. They did to me :( Can't afford 12$ right now to replace so... it for now
09-24-2012 11:48 AM
Andrews-bad-SE I got my Motorcraft SP-463's... The threaded part seems a little shorter than it should be. Should I be concerned? Or am I being a worry-wart?
09-24-2012 01:56 AM
iminhell
Quote:
Originally Posted by 04RedRocket View Post
I love the autolite 104's.
Wrong engine bud.
The 104's don't fit a zetec.
09-24-2012 01:03 AM
Blue5ive Never heard of a loss in mpg when using copper plugs. I didn't see a drop.
09-23-2012 05:20 PM
04RedRocket I love the autolite 104's.
09-23-2012 04:01 PM
iminhell The coppers (SP-463) is a colder plug.

I've no clue on MPG loss or gain.
09-23-2012 11:19 AM
Andrews-bad-SE Thanks guys! I got a set of Motorcraft SP-463's coming now. Here's a related question... I've heard that fuel economy drops when using a copper plug. But the copper plugs are hotter, resulting in more fuel burn. Why is this? I mean, I'm not really that worried about losing an MPG here or there to make a little power, I was just wondering why that is.
09-23-2012 10:54 AM
zetecDon Either stick with what the manufactor recommends or going with the Motorcraft or Autolite copper plugs. Other than that, you aren't going to see any significant increase using those plugs.
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