A friend of mine uses Nitrogen because it allows for a more constant air pressure when the tire is hot/cold. Before doing any type of tire work, you have to warn the tire technician first.

This brings up another topic. Many modern cars can display the current tire pressure on the dash display. Any way to get the TCH to display the tire pressure? If the car can tell you when the pressure is low, then the tire pressure is being sent someplace. Any hacks or 3rd party monitoring tools available for this?