I never know whether to laugh or cry when people write off manufacturers' claims as "marketing baloney" with no basis whatsoever. I also wonder just how many people know what a plasma bore is, and how hard it is to get an oil certified to some standards. But by far the most amazing thing to me is that Nissan managed to make a $70k car that outperforms cars costing four times as much, and so many amateurs assume right off the bat that they know better than Nissan's engineers... Guys, it's entirely possible that Nissan's choice of lubricants was skewed by marketing. But the fact that it's possible doesn't make it true -- and even if it is true, that wouldn't mean that we all have the knowledge to make a better choice. Nissan did not screw around with this car. They wouldn't make their recommendations willy-nilly. There has to be something to them.