Iridium VS Normal nickle/copper plugs

And so I thought I'd save much time working on the plugs if I had to change them every 12 000km. Besides, i wont have to be spending any more money on trying to get the honda specific plug tool.

Iridiums were kinda cool in the 1000 mile trip I took, perhaps one of the main reasons for the shocking performance. Starting up was also a breeze. Something I wasnt able to replicate again.

Here, on the left are the Iridiums I got, They cost about 4-5 x your normal plugs

Well they were supposed to last 50 000km. At 14 000km, they started misfiring. When removed, they had some build up around the iridium tip, oil after the gaskets. Well, I had them replaced and they started just right. They were really cheap too.

I would have gone with the denso's the next time around.
Maybe their U groove techonology works?

 Plugs were showing that I was running lean.. So i decided to richen it a little.
Wow, engine runs much cooler now.