iridium spark plugs worth it in a 6 cylinder?

Being Toyota puts the cheap standard plugs that are to be changed every 30k in the 6 cylinders, but the long lasting iridiums in the 4 cylinders is it beneficial to put iridium plugs in my 6 cylinder? NGK the best ones?

 

I put irridiums in because I didn't have to change it for 90k. When I hit 120k, I put another set of irridiums in there. time is money

 

standard plugs unless you are blown on the v6.

 

No doubt the iridium plugs will last long, but before you jump into using iridium plugs when copper plugs are what the manufacturer recommends and there is a reason and it is not to keep the initial cost down read the links. You need to understand the difference and why copper is the better choice for your vehicle Your system is designed for the copper plugs, stay with them.
http://www.carsdirect.com/car-repai...m-and-platinum-understand-for-top-performance

http://shop.advanceautoparts.com/o/article-spark-plug-basics