Originally Posted by kannibul

Well that clarifies things...(sarcasm)

I mean, if Nissan markets the oil as synthetic, and it comes loaded with it from the factory then what's the harm...unless it's dino oil with additives (as spec'd here, and what I also believe to be true) - then that puts a twist on the logic of running dino-oil. I mean, dino oil with lots of additives are OK, but somehow synthetic isn't? The additives generally are what make one oil "better' than another, even to where something like a Group-III oil would perform better (ie, lubricate better, resist shearing, etc) than a Group-IV or Group-V oil...