Spark Plugs for 06 M45 Sport

[schu300]

Hey all! I got an 06 M45 with sport package. A few months, I went in for regular maintenance at my local in Infiniti dealership and my service tech advised me that I should change my spark plugs at 30K (my car has now 36K)

Being a car guy, I just couldnt see how my plugs could be "bad" after only 36K.

Last weekend, I got bored and took out a spark plug from the engine and looked it over, not too bad, regular grayish/white buring, tip still looked great and no corrison to speak of. I noticed the plug was a NGK plug and after looking it up, it appears to be one of the best plugs that NGK sells (13.00 a plug)

To those of you who have changed your plugs either at this stage in mileage or later, what plugs have you replaced in your engine and with what success (any gains in mileage or performance?)

Thanks in advance!

[RM450GT]

I replaced mine at 36k with the same NGK's it calls for.same thing... they were burning just fine.

[ken in az]

Just changed mine at 53k with the NGK Iridium IX plugs - cheaper and better than stock.

Didn't notice a difference good or bad but the old plugs looked a little tired and showed signs of detonation