NGK LFR6AIX-11 or LFR5AIX-11 Spark plug!!

[TITANG9]

Should I use Iridium one step colder? LFR6AIX-111-Normally Aspirated engine2- Island temperature between 70 -95 Fahrenheit throughout the year…no cold winter!!3- Constantly revving up the engine…not typical Sunday church trip.

[evildky]

stock should be just fine

[TITANG9]

Thx Evildky

Thing is, I read on the internet that with IRIDIUM plugs you should buy one step colder because they tend to work hotter than Platinum ones (OEM).That's why I was asking...

[evildky]

I thought the 350z came stock with irridiums, either way the benefit of irridium over platinum is simply the electrode lasts longer