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  #13  
Old 03-29-2015, 09:19 PM
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Re: Nitrogen in tires from factory?

A couple of stories about my experience with nitrogen fill.
I was at a dealership the other day and watched their procedure for filling tires with nitrogen. A tech took the valve cores out of each tire and let them go flat, then reinstalled the core and filled the tires from a nitrogen bottle. No attempt was made to evacuate the remaining air before adding back the nitrogen.
Recently I purchased a new set of tires for my pickup. The dealer wanted $30 for the nitrogen. I explained that I didn't want or need the gas, he said they wouldn't sell tires without the nitrogen fill. When I started to walk, he rethought the need for the gas.

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  #14  
Old 03-29-2015, 09:30 PM
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Re: Nitrogen in tires from factory?

As pointed out, just letting out the air and re filling with nitrogen defeats it's possible advantage, for if any air at all remains, with it's moisture, the nitrogen benefits are ruined... Thats one reason the whole thing is pretty much a money making scam to be avoided
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  #15  
Old 03-29-2015, 11:18 PM
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Re: Nitrogen in tires from factory?

I thought pure nitrogen in tires had less variance in tire pressure with heat / cold? I can see how that would be useful in the street...if that's true.
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Old 03-29-2015, 11:37 PM
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Re: Nitrogen in tires from factory?

Don't know about street use, but from the NASCAR site:

"The reason NASCAR tires are inflated with nitrogen, rather than the normal air we pump into our tires, is due to the increased stability under hotter temperatures that the gas exhibits. It allows the tire pressure (50 pounds per square inch) to remain constant throughout the race regardless of the temperature, which can reach 200 degrees Fahrenheit."

On the other hand the race commentators are always talking about the cars having to race a few laps on cold tires to build up tire pressure.
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Old 04-06-2015, 09:46 AM
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Re: Nitrogen in tires from factory?

I can offer a 75% Nitrogen fill for just 75% of what the dealer charges, and you won't know the difference!
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Old 04-06-2015, 10:45 AM
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Re: Nitrogen in tires from factory?

Quote:
Originally Posted by JackJones View Post
I thought pure nitrogen in tires had less variance in tire pressure with heat / cold? I can see how that would be useful in the street...if that's true.
I doubt that street driving causes the huge heat differences that a race car sees. So the first thing that would have to be determined is ,with smaller temperature differences, will the effect be any more than theoretical?

Since specs for tire pressures are given for cold tires, allowing that as they warm up the pressure increases, there is another decision to be made. If the pressure is not going to increase as you drive, should you be starting out at a higher pressure to avoid driving on under-inflated tires?


I think I'll just stick with air.


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Old 04-06-2015, 10:48 AM
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Re: Nitrogen in tires from factory?

I just fill my tires with helium gas.

Helium is lighter than air so it lifts some of the weight of my car off the ground making my car effortlessly float down the road giving me incredible MPG !!

If I hit a speed bump at the right speed, I can jump right over the car in front of me.

But you do have to be careful not to over inflate because you may float away into space
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Old 04-06-2015, 11:22 AM
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Re: Nitrogen in tires from factory?

I knew a guy who ran a Ford F-350 Dually. After a Helium fill on all 6 tires, he had to weight the truck down with cinder blocks, or he couldn't get any traction. The tires would also admit a high pitched squeaking sound whenever they hit a bump.
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Old 04-06-2015, 02:23 PM
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Re: Nitrogen in tires from factory?

I have ran nitrogen for well over 10 years now and very happy with the current results...

I agree a lot of the "benefits" are likely snake oil for standard road use and if I had to pay much for it I also wouldn't worry about it.

In fact, the first company I used charged as much as $20 extra PER tire and no way is it worth that!

Now, not only do I get it for VERY cheap, but they pull a vacuum on the tire and pump out a considerable amount of the initial air before adding 100% nitrogen.

Again, I cant speak to the other advertised benefits but for me the one that makes it worth it is the fact that I don't see the variance in tire pressure from season to season.

Granted in Alabama we don't have the extreme seasons as many others but I can still go 2 full years without adding anything to those filled with Nitrogen where as other friends and family members will have to add a few pounds when the temps drop for the first time in the fall.

Bottom line for me, the fact I can get it stupidly cheap and they pull a vacuum, its worth the price of admission.

Costco and a few other dealers offer it for free and though they dont pull a vacuum, if they have a good /comparable price & availability on the tires you want, then the Nitrogen fill would help pull me to them over someone who didn't offer it or charged for it.

If you have to pay more than $5 a tire for it, especially if they don't evacuate the initial mixed air, then I agree, stay away. My .02 cents.
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Old 04-06-2015, 10:41 PM
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Re: Nitrogen in tires from factory?

Talking about air pressure loss. The other day while cleaning out a desk drawer, I found a Bic lighter that had to be at least 25 years old (stopped smoking about then). I tried it and it still worked! If Bic can build a 99 cent lighter that can hold pressure for 25 years, why is it that I have to check the pressure on my tires every month???
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