Ok, so I decided to play it safe and go with Platinums.

IDK though, you guys think 122,000 miles was enough? I think I could have got another 50,000 out of them, they look fine to me:











J/K Obviously

 

you went with OEM or the NGKs? Notice moar Pawa?

 

did you have any problems getting them out?

 

OEM = NGK.

NGK Laser Platinum's are the same thing Nissan puts in the motor. (in fact, I even double checked the model# that's printed on the old plugs.

So far so good, but I'm only halfway done.

I did exactly like DaveB said.

 

1 step cooler?is this help on hp or what.

 

^You should only run 1 step cooler if you're running FI, a built N/A, or NO2

 

it says in the owners manual you can run one step colder if you; a) live in a year round warm climate or b) normally drive in the upper RPM range

 

oh wow I did not know this. Sweet!

 

^Really? I did not know that! (kinda the entire point of this thread was to find out stuff like that)

Well, I meet both those requirements, but oh-well.

I do end up driving the car on some really cold nights (yes, it can get in the teens in North FL)

 

lol

 

BTW, my driver's side valve cover is crap

#6 plug well had a boat-load of oil in it.

 

Glad to see the poll is producing such clear-cut, definitive answers


OK, somewhat related question:

About to help my cousin change the plugs on his 350Z, and the way he's building it, 1 step colder will be the way to go.
What are the part numbers for one step colder in Platinum and Iridium?

 

So the answer is....? lol

 

Ok, nevermind my question. Found it my self

Stock heat range:
Platinum - PLFR5A-11
Iridium - LFR5AIX-11

One step colder:
Platinum - PLFR6A-11
Iridium - LFR6AIX-11

 

I've had Iridium NGKs in my engine for the last 60K miles. They've been great. Almost time to swap again.