I think its still a scam even though the theory is sound. Taking this measure is totally unnecessary for the average driver yet, dealerships hype it up like they are doing you some huge favor.
Paranoia alert:
I actually don't think they even fill them up with nitrogen in the first place. I think a lot of dealerships just put those little green caps on the valve stems and call it a day. At the very least, I can almost guarantee that when they check tire pressure and fill as necessary, they use an air compressor and not nitrogen.
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