I bought the Bosch Iridium plugs to put in. I was wandering are these ok to go with or should I return those and get the NGK plugs?

Plugs are plugs. If they are on the cross reference chart they will work fine.

It's quite funny that you are asking that question after the fact

Why did you not ask the question prior?

Telcoman

Do you usually walk around and think about these kind of life decisions? Also telco has a great question........

He can purchase my old plugs from my 06 G35 cheap. They only have 106.7k miles on them.



Telcoman

Just need a straight up answer not a whole lot of sarcasm. I appreciate you urbanengineer

I have found that these cars perform best with NGK iridiums. I prefer one step colder but stock heat range is fine as well. Part # LFR6AIX-11

Ok thanks so much

They were in bad shape

Bosch will work! How many miles on the plugs your removed? They're in bad shape!
Gary

But NGK's are better

Yes, the NGK are better. I've had both the Bosch and NGK and there is a noticeable difference. I also prefer the Laser Platinum NGK vs the Iridium. Reason being is that the Iridium gives you a false confidence in longevity - they do NOT last 105k miles. Not with decent performance anyway. Change the Laser Platinum NGKs every 40k miles at you'll always be running at peak performance.

I bought the car used with 134k miles and I put on another 60k before the change so I'm assuming 190k.

Still not idling "crisp" I guess that's the word

Clean your throttle body, and MAF. Should fix your idling problems. Change your PCV valve too. It's probably never been changed.

Also, check for cracks in the rubber coupler between the intake tube and throttle body. Cracks in that coupler (or anywhere after the MAF) can pull in unmetered air and cause idling issues.