Reply to "Nitrogen in tires?"

I have been using nitrogen in our road cars for many years with good results. The tire pressure does not change much between the winter and summer so I do not get the "seasonal" tps warning that sometimes happens. In many tires I have had not had to top up the nitrogen inside before it needed to be replaced through tread wear. The main reason F1 and Nascar use it is for consistent pressures. It is an additional $5 charge per tire to add nitrogen at the shop I use. If I need to add regular air at any time, the shop will purge the tire and refill with nitrogen at no charge. I am also changing some of my tires at a dealership where a friend works. Their nitrogen fill station is an automatic unit that purges the air in the tire twice then fills it for the final time. If those tires just need a top-up, I use the dried air from my compressor. Most of the cars in my family now have a winter set of wheels/tires so over all, the tires will hopefully last more years than just using the one set. I hope the nitrogen will preserve those wheels and tires better, especially the mag wheels. I also read somewhere that nitrogen is slightly lighter than air so you could get an extra oz off your unsprung weight!