Originally Posted By: Spector
Wait a min, you are in Canada, I would go with a 0W30 synthetic due to the climate and look at the owner's manual, cannot believe it says every 3 months under normal conditions!
Nissan has a 3 month severe service interval, actually. As far as 0w-30, it has its place, but is far from necessary. I'm not using a 0w-XX, and it's been hovering around that -22 F mark for a week.