The question has been posted many times on these forums, and the overwhelming majority respond, ... just use regular air. I agree.
Since both my automobiles are still under warranty and all servicing is covered for 2 years, I don't worry about my tires. They take care of them. But once out of warranty, I have my own air compressor. My last car originally came with nitrogen, but I'm sure when we traded it was all just normal air. My TT tires are all air. I think the "nitrogen" (thing) is just a gimmick, to make you think you need something special. You don't. ... as stated above ... race cars and airplanes, yes, The family RV ... NO!
