The Nitro Fill machines fill the tires with 96% Nitrogen. It is a larger molecule so you have less permeation through the sidewall and there is less fluctuation in pressures with temperature changes such as weather or friction induced from driving.
If you don't believe in it, record how many MPG you get(assuming you have this function with your vehicle) install Nitrogen and reset your MPG setting. I did this test with my vehicle and with one of my advisors vehicle and we both increased our MPG immediateley.
IMO- Not snake oil AND beneficial to the customer. We sell it for $10 per tire with lifetime free replacement.
I hope we are the first store they think of when they need a tire....
[This message has been edited by TD (edited 10-08-2007).]