As you surely remember Nitrogen is an inert gas, Oxygen is not. There is a reason its used in Aircraft, Racing, and Mining industries. Oxygen is prone to flash point explosion from excessive heating. Which can be a result of either extreme weight resulting in increased temperature or the extreme of a shuttle on reentry to Earth's Atmosphere.
Right, I learned that N2 is an 'inert' gas in the seventh grade, as I'm sure you did. It was repeated to me all through my Chemical Engineering and Electrical Engineering cirriculums (cirricula?) all through University. And right through graduate school. However, I think the correct term is not "inert", it's "less reactive".
I'm not sure what you're trying to say. What you wrote doesn't make any sense. O2 cannot burn or explode on its own. As such, it doesn't have a flash point. I assume that you intended something other than what you wrote.
Oxygen cannot burn or explode on its own. It has to have something to burn. It's an oxidizer. As such, it needs something to oxidize such as fuel, something combustible. Assuming you meant that O2 can support a burning tire, this is a non-issue for cars.
In any case, corrosion on the *inside* of the tire (tire materials or the metal wheel) is a non-issue. You disagree with this?
The problem with your argument is that the majority of the tire surface is exposed to atmosphere. Hence, supposed oxidation problems will remain.
Moisture is the main issue in passenger car tires thats absolutely correct. However when done properly you eliminate 99.9% of moisture. Thereby increasing the life of your vehicles tire and wheel from reduced corrosion and rusting.
Corrosion? When was the last time you heard that someone's tire failed due to corrosion from the *inside*?
Again, the problem with this argument is that the majority of the tire surface is exposed to atmosphere.
I don't think anybody is concerned about tire or wheel corrosion due to normal atmospheric moisture (humidity) in the tire cavity. The NHTSA sure isn't.
Passenger car tires are subject to below freezing temperatures, burning hot 100+ degree temperature days, sometimes in the same day! Passenger car tires are also subject to moisture from the same dew build up that you see on your windows in the morning.
Uhhh....how does dew get inside the tire? LOL. I know what you mean, sorry. You meant that some of the moisture that's in an air'd tire will condense due to cold surface temps.
Seriously, one of your concerns about humidty is that it causes corrosion to the tire materials and wheel. Normal humidity levels of moisture in tire air causing corrosion is not an issue in passenger cars. You disagree with this?
Nothing even nitrogen is the replacement for proper care and maintenance of your vehicle and your tires. I'm glad your method works, but nitrogen inflation is beneficial.
*If* there is a benefit, it's negligible and it doesn't exceed the cost.
Nitrogen: the new Marvel Mystery Oil
Hmmm....I don't recall any of the dozens of tires I bought over the last 20 years that said, "Use of air for inflation is not approved. Use N2 Only".
Oxygen retains moisture hence why you see oxydation and rust on anything metal.
Excuse me, how does oxygen retain moisture? Please explain this concept to this Chemical Engineer and Pilot.
The key about N2 or dry air is to displace moisture. However, I think we actually agree about removing moisture despite your misunderstanding of oxidation.
How is that different than passenger car tires?
Again, I ask, how many times have you seen car tire failures due to corrosion on the *inside*? How many times have you seen tire fires or brake fires on passenger cars?
My car tires are always replaced due to tread wear or road damage, not due to corrosion.
Have you replaced tires due to corrosion damage?
Of the dozens of passenger car tires I've bought over the last 20 years and the hundreds I've worked on, I don't recall seeing this on the tire, "Use of air for inflation is not approved. Use N2 Only".
I've an average of 2-3 mpg better in my wifes car alone, besides all the other testing and information out there. I'm keeping nitrogen.
How does X PSI N2 give better mileage than X PSI air? Given identical pressures, the same force will be exerted on the tire tread and sidewalls, regardless of the gas and, hence, produces the same diameter tire. Yes, moisture in air'd tire will give a slightly higher pressure than an N2 tire when tires are at road temperature when both start out at the same cold pressure. But....that translates into better mileage, no? Understand the point I'm trying to make?
Clarification --> Cars A and B are both at 75*F (ambient) at start. Car A has N2 tires. Car B has air'd tires. Both cars start out COLD and at 35 PSI. Both cars take off. After five miles of driving at commuting speeds, Car A's tires are at 37 PSI and Car B's tires are at 37.2 PSI.
So, you're saying that the lower-pressured tire gives *better* mileage?
Me thinks that you might be getting gas mileage because your attention to tire inflation/maintenance is better than when you were using regular air.
When people claim better mileage using tire N2, filling up with N2 is probably the first time they are running their car tires at the proper pressure.
You might counter, "but N2 gives more stable inflations!". How does that produce better gas mileage?
"Testing and information out there"? What testing and information do you refer to? I've seen some of the hype. All of it I've seen comes from the N2 inflation equipment vendors and those selling the service and gas. I hope you're not using their data. I'm trying to be objective about this and I cannot, for the life of me, find independent data.
When looking at the reasons N2 inflation vendors and service centers explain why you should use N2, they almost always point to the fact that airplanes use N2 for various systems. Thus, they surmise, you should use it in your tires. This reason has nothing in common with passenger cars. None. Not even this "stable inflation" myth. Yes, inflation pressures won't vary as much with 97% pure N2 as they do with regular air, but this isn't the whole reason for using N2 in aircraft tires. I have a friend of a friend (both are fellow pilots) who has a Mooney (airplane). Some A&P decided he was going to use compressed air in the tires. The result? Upon take off, the tires heated up....tires expanded just a weeeeeee bit more than usual. Given the tight tolerances of aircraft parts, this wedged the tires in the wheel well. Guess what happened....the pilot couldn't lower the gear. He had to belly it in. How does this apply to car tires? It doesn't. I can't remember the last time someone aired up their tires with compressed air and then found that wheels wouldn't turn because they expanded just a weee bit more and jammed against the wells.
It doesn't apply to the fact that aircraft use N2 for the oleo struts to prevent oxidation pitting of the struts. Again, no application in a car. N2 in aircraft tires are used to put out tire fires and brake fires. Again, no application whatsoever in a car.
When you fill your tires with N2, don't forget to top off the headlight fluid and muffler bearing oil. LOL.
Again, I counter that N2 is NOT beneficial. It does no harm other than to drain your wallet.
N2 in passenger cars and trucks bad? Nope.
Increased Gas Mileage? Hype.
Benefits? None for passenger cars.
Expense? Some. I see places normally charge $5 to $10 per tire.
Nitrogen: the new Marvel Mystery Oil