Go to your owners manual, turn to section 9 (page 9-8 for my 2010) and pick the plug listed for your engine. If they've been good enough for 100k +/- why argue with what works? Get the brand and part number the vehicle came with.

 

Failing that, Japanese plugs for Japanese cars/trucks (Ie Denso or NGK. not bosch, autolite, etc).

As for material, copper's cheap but doesn't last. Platinum's better, double platinum only really benefits waste-spark ignition systems. Iridium lasts the longest but then you start running into issues with leaving them in and unmoved for so long they fuse to the head.

I use NGK Iridiums in everything I have (Mazda, Toyotas, Suzuki bikes, even the VW and Firebird respond well to them.)

 

I use NGK Iridiums

^^^ Yep, what he said. ^^^

 

I changed the iridium ones in my pathfinder at 103,000 and they came right out without issue.
They also looked beautiful still so I bought another set and good to go.

Clint

 

Lucky you. I haven't torn up threads personally but I've had a few feel like they were starting to go (they didn't torque up nice and clean like they should) and more than a few stores from other guys in the shop about them. Some of it is in the technique removing them too I'm sure.

 

Do it on a stone cold motor, they creak coming out but were fine. I used anti seize compound putting them in and tightened by hand and not too much.

 

I'm pretty certain NGK recommends that you not use antisieze on thier plugs. They state they have a special coating on the plugs to keep them from seizing.

 

Nissan head tech said they use anti on all the plugs they install.

Clint

 

Crack the plugs loose, then start the truck and give it one hard rev. That will blow the carbon out of the threads and prevent the plugs from seizing on the way out.

 

At face value this sounds like a bad idea... Links to any literature that back this up?

 

NGK all the way. I won't use anything else in a Nissan.

Manufacturers like to stretch maintenance intervals; it sounds like less trouble and cost to the buyer. Lies!

The dealer quoted my father $700 to do the plugs on his 07 Maxima. What a joke. I had already done the job for about $75 in parts. I always use anti-seize.

 

I would go with the NGK iridiums and put antiseize on them. I don't care if NGK claims they put some coating on them that stops seizing. The only plugs I dont put the antiseize on are the ones that go in my dirtbike, and that is because it is a 2 stroke that goes through them often enough that I never have to worry about them having time to seize up lol

I'm not sure which exact plugs from NGK our trucks use, but I am sure it is on the NGK website somewhere

 

Not on my vehicle. But I've seen NGK's seized up in other vehicle's. Good choice.