The Platinum tipped plugs used on the Rogue are rated for 105,000mi. There is no need to replace them earlier.
The stock plugs are NGK DILKAR6A-11. This is an iridium/platinum tipped plug that is part of the NGK Laser Iridium Series:
http://www.ngksparkplugs.com/p...e=nml
I have used NGK plugs extensively and I swear by them. Quite honestly, these plugs are about as good as it gets. I have tried others and trust me there are certain spark plug designs out there that actually hinder performance.