platinum vs iridium

General discussion forum for J30 and M30 owners!
kbflip02
Posts: 837
Joined: Mon Nov 12, 2007 8:58 am
Car: 1994 Infiniti J30
2006 Infiniti G35x
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so ive heard platinum is better than iridium...yet OEM reccomends iridium and im wondering why...ive heard stories about weird symptoms when not using OEM plugs but i cant find a valid explanation...anyways just a thought i had...


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yodawill2000
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Joined: Thu Mar 24, 2005 4:10 pm
Car: 94 Infiniti J30
Location: Grand Prairie TEXAS

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Hmm I thought I read that double platinum NKGs where OEM spec ??

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J30inthe sun
Posts: 246
Joined: Wed Mar 07, 2007 4:48 am
Car: 1997 J30

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I just replaced mine with NGK PFR5G-11. The Infiniti manual says that is the standard, the NGK PFR6G-11 the manual says is the cold type. These are the double tipped platinum laser welded plugs.

driverdriver
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Joined: Fri Aug 01, 2003 10:36 am
Car: NICO's longtime resident Canuck!!!
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Its just one of those things. For whatever reason NGK's work the best on J30's/300ZX's.

Their are literally hundreds of threads on this forum and others about bad results with non NGK plugs.


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