Does everyone know that the nitrogen fill at tire shops is about 94% Nitrogen? The generators CANNOT deliver pure nitrogen. It is also not particularly dry.

It is important to keep this fact front and center as you evaluate all the claims made about nitrogen fill- virtually all the arguments use 99.99% pure nitrogen (ie "technical pure') and certified dry as the comparator...once you acknowledge the tire store fill is marginally better than air, and no more dry that their compressed air, the whole thing falls apart.

Tire stores and their equipment vendors have spend big money on how to get an extra $30 in profit along with each set of tires they sell. Indeed, most store employees have bought into it as well.

I see green valve stem caps and just smile.