The newly mandated tire pressure monitors are going to malfuncton with plain compresed air - mostly due to the inherent moisture and corrosion caused by the trapped moisture (humidity) Air is 78 percent nitrogen, just under 21 percent oxygen, and the rest is water vapor, CO2 and small concentrations of noble gases such as neon and argon, Mechanic friends of mine have told me of problems with corrosion (and malfunctioning) tire pressure sensors, Much of the moisture problem with compressed air could be solved with adequate air filters, moisture traps, and driers,
Nitrogen is just plain superior to plain compressed air, which is why race cars and airplanes have been using it for years, If you switch to nitrogen, be sure to put the green valve caps on your tire valves and remind your auto sevice personnel to not monkey with the tire presure unless thay have nitrogen