nitrogin filled tires - Ford Mustang Forum
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post #1 of 23 (permalink) Old 09-03-2006 Thread Starter
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nitrogin filled tires

Hey people,

my wife works at a toyota dealership and wants me to get my tires filled with Nitrogin........anyone else do this? what are the benifits?? washed and waxed my stang today ..........wouln't you know its pouring out side . gotta love this south florida weather.
any input welcome.


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post #2 of 23 (permalink) Old 09-03-2006
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Well, military aircraft use nitrogen in most tires. Nitrogen molecules are larger than air and escape less rapidly and it is also less susceptible to expansion and contraction. Nitrogen is also lighter than air and people have reported better gas mileage. It isn't cheap. Can cost a few dollars per tire to fill.


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post #3 of 23 (permalink) Old 09-03-2006
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but what if i hit a bump? will the car start to float away? is this like flubber?
 
post #4 of 23 (permalink) Old 09-03-2006
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Quote:
Originally Posted by nghtrnnr
but what if i hit a bump? will the car start to float away? is this like flubber?
Yeah, gotta watch those speed bumps! Tell you what, if it got me an extra 2 mpg, I'd spend the $5 or so a tire. If not, I'm sticking to good old air.

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post #5 of 23 (permalink) Old 09-03-2006
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Quote:
Originally Posted by stlwagon
Well, military aircraft use nitrogen in most tires. Nitrogen molecules are larger than air and escape less rapidly and it is also less susceptible to expansion and contraction. Nitrogen is also lighter than air and people have reported better gas mileage. It isn't cheap. Can cost a few dollars per tire to fill.
Actually, Nitrogen isn't any less susceptable to expansion and contraction than any other pure gas. Pv=nRT for all pure gasses.

The benefit (aside from the already mentioned lack of seepage due to a larger molecular size) is that Nitrogen, unlike air, does not have any water vapor in it. It is the water vapor in regular air that is chiefly responsible for the increases/decreases in pressure caused by varying temperatures. Even the tiny bit of water vapor in normal air has a huge impact on pressures as temperature varies. If you were able to fill a tire with normal air at 0% humidity, it would respond to pressure in the same way the pure Nitrogen does. However, air, even at 0% humidity, would still leak out more easily.

Personally, it's cheaper for me to just use my compressor and keep an eye on my pressures. On the other hand, I can easily see it being worth the money to someone who doesn't want to adjust their tire pressure every week.

Claims of increased mileage are faulty, and are either the result of new tires (most people switch over when new tires are fitted) or of having had the tires under-inflated before switcing to Nitrogen. Claims of a smoother ride likewise baffle me since X PSI is X PSI regardless of the particular gas creating the pressure and Nitrogen at 32 PSI will cause the tire to behave exactly the same as if it were inflated with air at 32 PSI.
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post #6 of 23 (permalink) Old 09-03-2006
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Ive used 78% Nitrogen 21% oxygen and 1%other for years, its called air.
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post #7 of 23 (permalink) Old 09-03-2006
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fuel economy myth

Please don't spend money on nitrogen filled tires for street use - send it to the Red Cross instead - you will feel better and your $ will have some impact.

Zenmervolt is right on the ball. See attached links which tell you a bit more about nitrogen (scroll down to "Modern Applications") and reinforce the myth about better fuel economy.

http://en.wikipedia.org/wiki/Nitrogen

http://www.cartalk.com/content/colum...tember/05.html

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post #8 of 23 (permalink) Old 09-03-2006
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The only reason we used nitrogen in tires when I was in the Air Force was for heat disapation, Believe me, your stangs' tires will never build up the heat that a fully loaded F15 or a C130's tires builds up on take off and landing. You will just be wasting your money.

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post #9 of 23 (permalink) Old 09-04-2006
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I am not sure it is a waste...I have nitrogen in my 20" tires, and I have never have to check the tire pressure. I personally recommend it. IMHO, it is a good idea.
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Quote:
Originally Posted by mrvandermey
I am not sure it is a waste...I have nitrogen in my 20" tires, and I have never have to check the tire pressure. I personally recommend it. IMHO, it is a good idea.
Yup, if you don't have your own compressor, it can be a worthwhile move. Though I'd still want to check pressures once a month because I'm paranoid about that.
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Quote:
Originally Posted by stlwagon
Well, military aircraft use nitrogen in most tires. Nitrogen molecules are larger than air and escape less rapidly and it is also less susceptible to expansion and contraction. Nitrogen is also lighter than air and people have reported better gas mileage. It isn't cheap. Can cost a few dollars per tire to fill.
Nitrogen is not lighter than 'air' and the molecules are not larger....check your periodic charts. The only benefit of using Nitrogen is that it doesn't absorb water and therefor will have a more predictable increase in tire pressure as it heats up. Possibly there could be slightly less oxidation on the inside of the tire but since the atmosphere already is ~78% Nitrogen, I really doubt that would show any benefit.

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Quote:
Originally Posted by stlwagon
Well, military aircraft use nitrogen in most tires. Nitrogen molecules are larger than air and escape less rapidly and it is also less susceptible to expansion and contraction. Nitrogen is also lighter than air and people have reported better gas mileage. It isn't cheap. Can cost a few dollars per tire to fill.
Nitrogen isn't that much lighter that it's going to lighten the car and make it get better gas mileage. The savings is most likely due to the fact that the tires are properly inflated for a longer time. That will do more for mileage in any car. Another benefit is Nitrogen is supposed to reduce moisture on the inside of the tire, inhibiting corrosion. Many steel wheels failed due to rusting from the inside out. Air, under compression, will actually pool moisture. That's why you have to drain your air compressor every time you use it. The benifits, if any, seem to be negligible so I wouldn't bother myself.

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Quote:
Originally Posted by ipchay61
Nitrogen is not lighter than 'air' and the molecules are not larger....check your periodic charts. The only benefit of using Nitrogen is that it doesn't absorb water and therefor will have a more predictable increase in tire pressure as it heats up. Possibly there could be slightly less oxidation on the inside of the tire but since the atmosphere already is ~78% Nitrogen, I really doubt that would show any benefit.

-Chip in SC
N2 and O2 molecules are actually almost the same size and N2 is lighter than O2 (28 g/mol vs 32 g/mol). And if you go strictly by atomic weight, pure nitrogen is considerably lighter than dry air (78.1% Nitrogen, 20.9% Oxygen, 0.93 % Argon & trace (<.1%) amounts of other noble gases, carbon dioxide and air pollutants). Have to go now... Late for 3rd period science class

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guys guys guys, i go to college too u know, i respect your up-to-date info, but you're acting as if you will keep your car for centuries, we all love our cars, but don't be soooo picky about what kinda air u wanna put, if u wanna preserve anything, it should be ur engine, use MobileOne oil and high quality gas that's all, GOD.

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