I have bought the NGK iridium plugs to put into my Xterra myself. Recently I booked an appointment to get my oil changed at the local Nissan dealership and the service guy did not recommend installing the NGK plugs into my vehicle. He said there has been problems with them and recommended the Nissan plugs...which of course he sells over the counter. Is he just trying to make a sale or does he speak the the truth?
Can someone please tell me if I should install the NKG plugs or follow his advice and install the Nissan plugs?
Thanks

There's no such thing as a "Nissan" plug.

Your engine came from the factory with NGK Laser Platinum plugs.

Any Nissan tech with more than a couple of years under his belt should know that Nissan engines generally perfer NGK plugs in the first place.

I put NGK V-power plugs in mine when I changed them, it's happy.

There's no reason you shouldn't put the iridium plugs in there, and I've seen plenty of posts from others here that have as well. They're going in mine (indexed no less) when I swap in the ported cylinder heads soon...

Brent