You can save money by filling your tires with N78. N78 is available almost everywhere and is comparable with N100 if your tire valve caps are green. If you have a compressor at home, you can make as much N78 as you like and fill all your tires and you can make points with your neighbors by giving away free N78. If you are going to drive your new Ascent at top speed for long periods or you have a large airplane, 100% Nitrogen is the way to go. At high altitudes, water can freeze in the tires and any oxygen in aircraft tires at high pressures increases the chances of auto-ignition in the event of overheated tires. All braked wheels on aircraft should be inflated with Nitrogen.My delivery dealer says my tires are filled with nitrogen...put on green caps....does everyone have nitrogen?
Filling car tires with Nitrogen is a scam, that is unless it is free. The only benefit to conventional car tires is the slower rate of pressure loss that takes a year or two to detect; it does not eliminate your responsibility for checking tire pressures at regular intervals. I would suggest that 100% Nitrogen has about the same benefit as filling your tires with 100% Helium. You can save a few grams of unsprung weight, one of the factors that go into the design of suspension systems. In either instance, there is no practical benefit. That being said, you can fill your tires with a special trace gas mix of Nitrogen and Helium or Argon. Using that mass spectrometer or gas chromatograph you got kicking around in your garage, you can locate the leak in that problematic tire. If you don't have that setup, you can fill your tires with air and apply bubble soap with a squirt bottle.
Okay, enough of the BS, here is a real life situation. I have a neighbor that got new tires fitted at Costco. One day she asked me about the 'Check Engine' light. I went over with my OBD tester and found that a camshaft sensor was acting up. After reseting the light, the problem did not reoccur. However, I did notice that the tires looked a little low, sometimes hard to see on regular radial tires. She told me that she had not had time to go back to the Costco tire center to get them checked. What the ****? How many people out there have nitrogen filled tires and are concerned about adding air? I will admit that I got a new set of Michelins on a car at Costco and I actually started to think twice about adding air to the tires after they put those stupid green caps on the valves stems. Filling tires with Nitrogen is VooDoo. People that sell that sort of crap should be ashamed of themselves.