Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen,
0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. See:I can't see paying anyone anything to get the extra 20+ % of oxygen replaced in my tires by nitrogen, even for FREE.
I don't have a roll cage, self sealing gas tank, four point harness, helmet, or any other NASCAR stuff in my fine old 1993 Ford F150 XL truck, or, in my 1994 F150 XLT truck.
So, I don't bother with any other crap that costs extra money!
Hey, retired from 20+ in the USAF, and we never needed any extra nitrogen in our vehicle tires!