Denso Iridium core plugs?

[morpheoussc400]

Anyone tried these yet? I put them in my Olds and my wifes Altima and they worked great...

[GETSOMZ28]

I doubt if too many have changed their plugs out yet, but those would be good as any.

[SupraTitan]

I looked at my plugs in the titan I believe they are NGK iridiums, had the real tiny center electrode, need to look up the part number. With 13k miles however you wouldn't be able to tell the difference between that plug and a brand new plug. Zero carbon or any other build up on, like i said looked brand new.

[SupraTitan]

Looked it up the stock plugs are the NGK double platinum. They retail for over $11 a piece!, the iridium ngk plug for the titan retails at just over $7. Definatly not worth swapping, espcially from a performance stand point. Usaully you will find the best performance with a fresh set of $1 copper plugs, at least thats what i've always found worked the best in my supra which calls for a plat. plug. Just require yearly changes.

[GETSOMZ28]

Supra, I agree with the copper plugs (run hotter than platinum) from a price/performance standpoint.

[pciley]

What about "nippon" denso iridium? Are they one in the same? I like these for my quads, and the Prelude I got rid of. They cost quite a bit if I remember, over $10?
I won't change the plugs though until that part of the service interval/milage recommends.

[juma]

Originally Posted by SupraTitan

Looked it up the stock plugs are the NGK double platinum. They retail for over $11 a piece!, the iridium ngk plug for the titan retails at just over $7. Definatly not worth swapping, espcially from a performance stand point. Usaully you will find the best performance with a fresh set of $1 copper plugs, at least thats what i've always found worked the best in my supra which calls for a plat. plug. Just require yearly changes.

another interesting thing about coppers...champion for example extend slightly further into the cylinder and gain a little timing because they start the flame slightly quicker and it burns slightly quicker. juma

[drags1998]

They'll work great, BUT, I wouldn't worry about changing them until you get about 60-70,000 miles on the ones in there now!!!!!! I did the plugs in my 4.7 Dakota at 65,000 and noticed NO DIFFERENCE!!!!! Its your MONEY????

[LikeaRock14]

Just a quick butt-in for this one-

On CTW a couple weeks ago, there was an article about getting more mileage/power out of your TBI. The company from which they ordered the test kit for the TBI pickup said they've had the best reults with stock AC Declo plugs. Said they get the most responsive and reliable spark out of them

Maybe stockers are just fine?

[loufish]

On a lot of new cars now days, I run the stock plugs. The factory designs cams, & cyl heads for performance, economy, and emissions, then they design a spark plug to work with all that. 95% of the time, the best plug for an engine is the one designed just for that application.

[SupraTitan]

Really the only advantage of platinum or iridium plugs is longevity. I have no doubt the stock plugs in our truck will last a minimum of 100K miles. I think the stock plugs would be pretty difficult to improve upon, just yank one you will be amazed at how clean the plug is, almost scared me at first, not use to seeing plugs with 13k miles that look like they just came out of the box.

[sparkplugs.com]

denso and nippondenso are the same company. used to be known by nippondenso, but they lost the "nippon" quite a few years ago

[Marc]

Why mess with the stock ones? Nissan usually usues the best plugs on their vehicles.

[GreenT]

The iridiums are good plugs. They are good both from a performance and longevity standpoint. As good as copper and platinum in those respective categories. IMO still not worth it. I have always prefered copper and changing them once a year.
copper-performance
platinum-longevity
iridium-performance and longevity