I ran N2 in the tires of an RX7 Spec racer back in the early 1990's. It was an experiment. In racing conditions i.e. big fluctuations in tire temperatures it helped since the N2 didn't change pressure as much due to temp. SO it saved a ton of messing around to get the tires pressure set up. But back then it was expensive an not easy to get.
Today in everyday street cars, I suspect like others have said it's all about marketing. I'm not sure half the population even knows what a Turbo is and don't get me started on this "i" nonsense.
But all else being equal I'd take it. I've have no problem telling the service center NO to all the other BS things they would like to charge for.
Ed
