Believe me, I am the first one to call something bogus if a claim seems too big, preposerous, or someone is trying to sell snake oil.
That said, I had the guys in our shop fill my 2006 Cobalt SS's tires with Nitrogen to see for myself if the claims of better ride quality, better tire wear, less sensitivity to temperature would live up to the hype.
That was a few days ago, and now I'm here to tell you that I won't run another vehicle ever again without putting Nitrogen in the tires and here is why. The way my car now rides with the gas is a suble but very detectable difference. The tires seem a lot more "consistant". The ride has smoothed out a bit and with winter comming up fast it's nice to know I won't have to top off air in the cold months.
If you have a truck or an SUV, I would really urge you to give Nitrogen a try. Not just for the ride quality but for Nitrogen's ability to keep uniform pressure in a large tire throughout our four seasons here in New England. Also, keeping your tires at the right pressure, which will happen with Nitrogen, you'll end up with better mileage and more gas money in your poocket.
Come on down and try this experiment for yourself. It's $49.95 and for that sum our mechanics will fill all 4 (or all 5, if you have a spare) of your tires. Should you ever get caught in a pinch and have to put regular air in a tire, your initial payment buys you unlimited refills of 99%+ Nitrogen and we will purge the "normal air" tire and refillit for you.
Will you take my Nitrogen Challenge? Give the gas a try!