What do people think about iridium sparkplugs?
Has anyone try it?
how's it different from platinum and how much power increase?

 

Please refer to this thread: http://forums.maxima.org/showthread.php?threadid=78980

 

The Denso Iridium spark plugs are a very good plug but, they do not offer the longevity as a platinum plug will.

 

I would go with the NGK Iridium... From what I have read and heard they are very nice...

 

I have Denso Iridium plugs. Not really worth it, no difference from my old NGK platinums. I had to change plugs so I went with these, but it's really not necessary. Plus it's $14 per plug and there aren't any discounts on it, so it's a lot of money.

 

I have the NGK's... put 'em in when i did the 60k tuneup... decided to throw them in even though they were more expensive... but with the money i saved by doing the tuneup myself, i used nothing short of the best parts i could find...

as for results, the car seemed to be a little more 'peppy'... but that could be a combo of many things that i had done over that weekend... so, in a nutshell, i'd most likely buy them again...