With just regular air, the colder it is the higher chance of a flat. But nitrogen in tires seems bizzare but somewhat effective. What would happen if one was having a deflated tire(s) and decided to mix in nitrogen? Will it have any sort of advantage? It is very arguable whether or not it will used but I see it possibly being used instead of air. But another thing is what about hot temperatures on nitrogen filled rubbers?

No, you should use helium- it'll make your tires lighter. Who knows, it may even take off like a modified DeLorean

Nitrogen is less resistant to pressure changes in high heat situations, but they're the most effective in heavy load and high speed situations that regular on-road street tires don't see. Goodyear endorses nitrogen on tires for certain earth movers, but reports that with its experience on over-the-road truck tires, there appears to be small or insignificant advantages.

www.goodyear.com/truck/pdf/radialretserv/Retread_S5_V.pdf

I paid $39.00 and my pressure did not change at all for 6 months. Before that I was adding 1 to 3 psi a month. I get free top offs for the life of the tires. I put it in all my cars and got a deal. $88.00 for piece of mind on 3 cars with loved ones in them. Worth the money.

Think Hindenberg...put in Hydrogen.

The composition of standard air at sea level used to be 78% Nitrogen 21% Oxygen and almost 1% argon.

You aren't paying for the extra nitrogen, you are paying for the elimination of the water vapor.

Can you add air to the tires that have the green caps, or do you have to continue to only use the nitrogen?

It shouldn't matter much because the air we breathe is already almost 80% nitrogen anyways. So any air you put in your tire is 80% nitrogen already.

It shouldn't matter much because the air we breathe is already almost 80% nitrogen anyways. So any air you put in your tire is 80% nitrogen already.

Jackie,

You can add regular air to nitrogen-filled tires, but you'll lose any advantage -- if any, and most likely small -- than when filling with nitrogren only.

A Chicago Mercedes dealership recommended to my daughter that they fill her Mercedes tires with nitrogen for their "special price" of $59.95. I told her that it was basically a "dealer bottom-line enhancer".

My Honda dealer charges $19.95 with a coupon too.
Belle Tire around the corner charges $16

Actually, I heard that nitrogen does not change temperature as fast or as much as air (when your tires heat up due to friction on the road), thus it expands less when.

I have been running nitrogen in my 4000# luxury car for some time now and I have noticed a difference in the ride, plus they do not lose "air" from month to month. Another difference is that nitrogen does not heat up like regular air-filled tires so they are not going to increase in pressure during a long trip, which makes for a harder ride.

I have an antique car which is parked most of the time...I really need to get the air switched out to nitrogen in these tires since that will prevent/postpone tire rot.

It's definitely worth the minimal charge ($5/per tire) I paid to extend the life of my tires.

I suggest we give careful consideration to the use of Nitrous Oxide. If ordinary N2 molecules are 'fat' enough to slow down leakage, then how about the massive N2O molecule?

And what about the beneficial effects of whatever does leak out? The laughing gas we add to the environment should surely improve the quality of life for all!

Lets get a few things straight. First off, nitrogen is a smaller, lighter molecule than oxygen, therefore it is more likely to escape the tires than the larger oxygen molecule. As mentioned earlier, air contains almost 79% nitrogen anyway. The bulk of the remainder is oxygen. Dont waste your money. It would make more sense to put argon in your tires which is a much larger molecule if you're worried about losing pressure, but it may end up heating up your tires more. Take a look at a periodic table of elements and see for yourself that O2 is larger than N2.

The big advantage is that the nitrogen charge will not change pressure as the tire heats up and cool down. I think it will extend the life of the tire.

It has been known for a couple of centuries that for a perfect gas (which includes oxygen and nitrogen at standard atmospheric temperatures and pressures) the pressure is proportional to the product of density and temperature. Therefore, if the temperature of either oxygen or nitrogen increases, so too will the pressure as long as the density remains approximately constant. If a car tire expands slightly when hot, the gas density may decrease slightly (very slightly!) and so the pressure increase will not be as large as it is for the constant density scenario.

Another point: no matter how well the interior of a tire is preserved by the use of inert nitrogen, the outside of the tire is exposed to the chemical effects of oxygen (and to the harsh road environment) just the same as any other tire is. I find it hard to imagine that normal road friction won't completely dominate the lifetime of a tire.

Does anyone realize that the air we breathe is 78% oxygen with only roughly 20% being oxygen? this seems to be a well worded scam

Does anyone realize that the air we breathe is 78% oxygen with only roughly 20% being oxygen? this seems to be a well worded scam

I changed my truck tires to nitrogen and got an immediate increase of over 6% in fuel milage. The tire run smother, do not loose pressure, and maintain the same pressure weather in cold or hot tempertures, and in the mountains and at lower levels, the preasure stays the same. The nitrogen permeates the rubber and makes it stiffer so that it last longer and the oxidation inside the tire which comes from the moisture in oxygen is stopped which causes the tires to have a longer tire life with longer milage. With a TPMS system, which all new cars starting in 2008 must have, you do not have the low air pressure warnings in the cold mornings that you have with air. Some new cars are already coming out with mitrogen in them from the factory because the tires last longer, the TPMS problems are solved, and the main thing is you SAVE on fuel milage. I switched to nitrogen in my many van and increased my fuel milage by a whopping 16%. No one can tell me that nitrogen in tires is not worth the cost of change over, as long as it is a reasonable cost, somewheres in the vicinity of $30.00 for a set of 4 car size tires, and a little more for pickups and SUV's. Large truck tires would be more of corse because of the volume on nitrogen needed to inflate them but should be about $15.00 per tire. For those of you that use recaps, you should be able to get about 5 recaps off of the carcus due to no oxidation damage on the inside of the tire. Some people are trying to down the use of nitrogen, just haven't done the research in the matter. A trucking company ran a 9 month test on 64% of their fleet and saved 110,000 gallons of diesel fuel and got a 6.1% increase in fuel milage over the trucks that had air in the tires. They also nearly doubled the milage per 32/inch of tire tread wear as well. The company saved more than 1,000,000 CAD during the test period. This does not include the cash flow savings to the company due to longer tire tread life and more recapability of the tires. At some point in the near future we will have a carbon cap on the air by country. More fuel milage results in less emissions which the carbon credits can be sold or traded which will bring more savings to the trucking company as well. President Bush has mandated a 20% fuel savings by 2018, I think. With nitrogen in tires we can immediately reach 25% of that mandate and save ourselves plenty of money at the same time NOW. Any one who doesn't see the advantages of nitrogen in the tires now either has not done the research or is selling tires for a living and dosen't want the tires to last longer, he just wants to sell you tires more often.

Before putting nitrogen in my daughter's new Goodyear tires here in mid-Illinois, the cold winters would sap the air volume at least a couple times a month cause it sat outside. Last winter we put nitrogen in, and had ZERO problems with underinflated tires since. Also, it is good for people who put lots of miles on tires, as they all tend to get tire rot over time. I did the test with her car, and this year I've put it in ALL 3 of my vehicles at a cost of around $22 per vehicle. If your car sits outside, you might want to consider it. I prefer to plunk down $22 per vehicle rather than be outside checking the pressure when the cold winds are blowing.

I have a new HHR-SS and notice the Nitrogen pressure changes from 27 to 32 lbs after driving in this fall weather, cool but not cold. That seems like a larger change in pressure than I expected.

You people need to have a physics class. First you have to understand that the N2 in your tires is a COMPRESSED gas..not the air you breath. I am a student a LSU and we are working on this nitrogen gas put into tires. We filled a tire with regular air and another with N2...same tires and pressure. We had temperature sensors hooked up to both.. on the test machine we found that the N2 tires ran much cooler, we had BOTH tires going at a rate of 65 MPH. As a matter of fact 15* to 20 * cooler with the N2 tires. As we know,cooler tires run better,truer,and less likely to have air put in them from time to time. We are in the process of working on the tread life of the tire filled with air and the other all N2. we say YES! We figure you can add an additional 5,000-10,000 miles on a set of tires with N2 in them. Plus the gas savings through the life of the tire. Will keep you posted. But if your paying more than $10.00 a tire for N2 you are being ripped off. We all know that cooler tires handle better and less heat generated...for more life of the tire.. That's a no brainer!

I had nitrogen put in the tires on my car yesterday, and noticed an immediate difference in the smoothness of the ride when I drove home. If the nitrogen loss is less than the loss of "regular air" in the tires, it's worth it to me not to have to check the air pressure constantly throughout the winter. It was only $30 for the 4 tires on my older Cadillac and well worth it just for the smooth ride so far!

Paying for air is just as silly as paying for water, in a plastic bottle. Keep giving the tire dealers your money, they love it.

I recently bought new tires all the way around inflated with nitrogen. Yes the ride was better but didn't keep same tire rating either (i.e. that I went from Goodrich A/T to a more all weather tire). Seems to me, as long on open highway without alot of potholes and bumps the nitrogen is great but if you hit alot of potholes in your commute the gas seems to make you think your shocks are bad cause a good bump wants to send you flying!!! Yes, better gas mileage and ease of not checking tire pressure as often is worth it to me but just a warning that that pothole that stretches across the entire rad surface may surprise you the first few times with Nitrogen gas filled tires!!!!!!!!!!!!

I went at a mobil lube express and they offer the service and i found a great deal of difference. one my tires were at the same tire pressure for 6 monthes and more. I bought new tires which cost me 320.00 and i have seen no oxidation and i also noticed even tire wear all the way around. the mobil lube station said for me to bring it back for a check up every now and then for fluid and tire pressure check. they will top off any tire that is low or hook up the machine to be sure. i also drive alot and i found that it is a much smoother ride than regular air. before one or two tires would be down and i felt unconfortable now with nitrogen it's always a nice ride. i drive a chevy s10 with a 305 V8 with drag radials in the back and regular tires in the front 5 speed on the floor. beside the rumble of the motor it is a nice ride.

I have an 08 Lexus that came new with nitrogen filled tires. I live in Florida where the winters are mild, but drove up to Nashville. When the temperature hit 27 the low tire pressure warning came on. Bought a tire pressure gauge & all 4 tires were down 3-5 pounds. Called the two local Lexus dealers (didnt try tire dealers since where I live they dont use nitrogen yet). One does not use nitrogen yet, the other wants $50 just to top off my 4 tires. Absurd !!! So I went to the local gas station and used air !!! If they were to come out with a do-it-yourself kit (like the freon kits) then it would be OK, but at $50 a couple of times a year, forget it !!! Even on a $50,000 car.

I just bought a nitrogen tank for my hvac buiness and you can bet all my cars will have it in the tires before to long to try it for my self. The tank is 126 cubic feet. The tank filled out the door was $205 and the regulator that I got off that auction web sight was $68 so for $272 I can fill about about thirty cars. I found on the net that it takes between 1 to 2 cubic foot to fill a tire, of course it depends on the tire size. So if you really like your tires with nitrogen mabey you should think about buying a tank yourself and not pay $10 a tire, heak you could charge your firends $10 a car and make your money back in no time. The tank cost $12 to fill and some bottled gas supplires sell 80 cubic foot bottles also if you really want a lot of nitrogen they make bigger bottles. shop around because the price and size for bottles varies, I got the bigger bottle for less than the price of the 80. Just something to think about.

Bill With a 300lb N2 tank you can only do 40 tires or about 8 cars including spare. N2 benefits are only good if you achieve 95%+ in each tire. This means you need to purge each tire at least twice using calibrated machines using a tank alone, i would say purge 3 times and maight get to the 95%+ level.
With your 125lb tank, you might get 3 cars for your investment of $200+ dollars.
$20 is about average for a professional purge and fill with a year of free top ofs if needed. It's a bargain if you consider a Nitrofill machine costs $8000 dollars for a low volume machine and up to $18000 for a hight volume unit. Not to mention the membranes need to be changed every year at a cost of $3000. So for $20 you are receiving the benefits of $10,000+ investment on the part of the seller.