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Nitrogian in tires

6K views 95 replies 44 participants last post by  Barrie 
#1 ·
Does nitrogen in the tires really make a difference in mileage?
 
#2 ·
I am sure there is some science behind it, I know one of our local tire shops does it on all of the tires. can't say it did any night and day difference in our V8 grand still got the same 15-16mph on the hwy as always...
 
#11 ·
It doesn't do anything for mileage. It is just more stable and not affected as much as "air" by temps. So you get a more constant pressure. If you never get off the pavement it's fine, but airing up after a ride might be a tad more difficult unless you just happen to have a nitrogen source on board.
 
#15 ·
It doesn't do anything for mileage. It is just more stable and not affected as much as "air" by temps. So you get a more constant pressure.
that's actually the only benefit... nitrogen is inert, it doesn't expand or contract with heat. The "improvement in gas mileage" (I've heard that from several folks, most of whom were trying to sell nitrogen for tires) statement is based on the fact that having the same tire pressure for several years without having to check it will give you a better average over that time than if you have normal air, don't check tires, and let the tire pressure drop in the winter (resulting in less MPG during the winter).

It's basically for the modern "I shouldn't have to do anything" car owner...
 
#16 ·
I just put nitrogen in my tires a few days ago and no difference really noticed. I personally think its a gimmick and just another way for the dealership to make money..
 
#18 ·
Nitrogen in tires is so they don't change pressure as much as "normal" compressed air from ambient temp changes, and from getting hot while driving....

The Nissan GTR and some other "supercars" come like that factory.

It's not a gimmick. If you need to keep constant pressure in your tires, it is a much better choice than compressed air.
 
#22 ·
Maybe for Jeep owners, but it is a very important variable for race teams and or people that want to better dial in their high performance cars. Your tire pressures will change after a hard lap on a road course or at autocross. That's why tires say "Cold" max pressure. They take into account the pressure expansion as things heat up. I'm sure you already knew that

It would also be ideal for a climate where there are drastic ambient temperature swings daily, assuming you did not feel like checking your tires all the time.

But yeah, if you don't know why it should be done, it most likely has no benefit to you. (Talking to thread creator)
 
#24 ·
New studies show that Unobtainium is the best thing for your tires. Due to its chemical makeup it will not expand or contract due to temperature changes, is self sealing when the tire is punctured, is good for the environment and smells like roses. It is a little difficult to obtain so it's a little pricey.

At least that's what my local shop told me so I believe him.
 
#36 ·
It's science.
LOL, that tells us nothing.:banghead: Do some research before you post something that is pseudoscience. Those are not size pictures, they are pictures of the valence shells. N2 is about 3-7% bigger than O2 depending on how its measured. Don't get me wrong, its not much bigger, but it is measurably bigger.
 
#34 ·
Steping away from the science aspect of this.

Manny of us air down for offroading and then air up via our nearest means to do so. Never is there any concern about what kind of air is comming out of the air pump that is used to fill our tires back up. No one after a day of wheeling is rolling around the streets on 8 or so psi looking to re fill up there tires with 100% nitrogen from a dealer or tire place and then paying the nice fee to do so.
 
#35 ·
For those that want to pay for nitrogen in their tires, please send me the money instead. I'll send back a box full of free air that works just as well in return.
 
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