Originally Posted by fastnoypi
The dealer probably doesnt have real nitrogen tanks for the fill, probably just an old air compressor with a "Nitrogen" sticker.
Nitrogen does work however, but i've only witnessed actual Indy, Indy Lights, and F1 pit crews use it in their paddocks. It is more stable to expansion with heat cycling but still needs to be monitored.
bottom line, there is no advantage to nitrogen fill for daily drivers.
THAT is the only advantage to it, and yes, I have seen it in use in NASCAR, from Sprint cup down to the old Winston West we used to run we used it because for two hours of a race you can put in 23 lbs and KNOW it will stay that way without expansion., Even then NONE of us used it in our own cars because it is a waste and we got a cylinder for $12.00 at a Gas supply house that would last for many races and we used it for blowing away moisture, rubber dust, you name it; cheap air!! By the way, the $12 is for a refill; the initial tank was under 1500 lbs pressure and costly;