What do you think of inflating tires with nitrogen?

N2 is slightly better inside a tire than O2. It will probably make a tire last a week or 2 longer over a 20 year life.

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Bob

Hello Shaman,

S> Sure I am a member, but did'nt never ever bought a single tire there. S> The clerk told me it's a "service" they offer to ALL their members.

Excellent. I will enquire the next time I am there. On this Nitrogen business, if it is costing me nothing extra then I am ahead because I don't believe that it is any worse than air, and if anything it is better. Even if it costs me a little extra but keeps the tires are the right pressure longer then that is worth it also, since my time is money.

S> So, as Matt said, it's not "free" because I pais my member card. But S> it's free, because I didn't pay for this specific service.

If you want to split hairs, it may not be free depending on how much you shop at Costco, but if you shop at Costco often you have already paid off your membership card fee so it is free.

Regards, Wayne Moses Houston, Texas

"Wayne Moses" a écrit dans le message de news: snipped-for-privacy@news-server.houston.rr.com...

The guy at Costco told me that Nitrogen is better than air because it keeps the tires more "cold" so the high temperature in the tire won't effect the pressure. With air, hihg temperature = hihg pressure, wich is bad for the tire, and gas mileage.

For the Costco thing, the Costco store is at 5 minutes from my place, so I shop there every weeks.

Shaman

Hello Shaman,

S> For the Costco thing, the Costco store is at 5 minutes from my place, S> so I shop there every weeks.

Same here. May go there today, even.

Regards, Wayne Moses Houston, Texas

Wow, you can't make this stuff up! And I bet he even has a high school diploma.

"Edwin Pawlowski" a écrit dans le message de news: oGLWh.5261$ snipped-for-privacy@newssvr14.news.prodigy.net...

Regardless the diploma he has, I think this is just right. And if not... why bother? I did'nt even pay for that service

Shaman

"Shaman" wrote in news:U_xWh.101538$ snipped-for-privacy@weber.videotron.net:

I do too. About 78% of the air in my tires is Nitrogen. So, inflated to

38 PSI, even if the other 22% escapes, I'll still have the 30 PSI recommended by Hyundai for my tires.

Eric

You think what is right? High pressure is bad for gas mileage? It usually improves. Or that nitrogen has cooling effects? It may not expand as much as oxygen, but it is not going to act as a coolant to keep the tires more "cold". Higher pressure may or may not be bad for the tire, depending on actual pressure and speed traveled.

I'd take if for free too, but I'd still not believe the un-natural acts of physics he is speaking.

It still isn't free. Even it if only costs $5/tire, that means that Costco could use air and lower their tire costs by $5.

Matt

Wow, it just keeps getting more ridiculous all of the time. However, I guess if you buy tires at a store like Costco, then you are pretty gullible to start with and will believe most anything.

Matt

Yes, that is even more scary to think of...

Matt

I like your logic and use much the same logic. I tend to run my tires at 35 psi and check them every month or two. I rarely lose more than a pound a month and that just isn't consequential. And the more times I add air to my tires, the more pure the nitrogen inside is getting as the oxygen "leaks" out!

Matt

Who said that I bought my tires there? I never bought tires at Costco, the little shop where I go always have unbeatable prices on tires. Anyway, I had it for free (Nitrogen inflated tires), so where is the problem?

Shaman

False. As you add new air, you add 21% of oxygen and 1% of other gases, wich I don't know what gas it is. So when you add air to you tires, you contaminate the Nitrogen in it. That's my logic. So you wil always have 78% of Nitrogen.

Shaman

How so does this make you gullible? They sell dam good tires there, and reasonably cheaper than anywhere else. I'll be getting my next set there, Michelin Energy MX4's. On the other hand, I don't buy into that nitrogen story either.

False. If you start out with 78% nitrogen, leak out some oxygen, then replace say,

5% of the total volume with air, the nitrogen is still increasing, albeit by a smaller amount than adding pure nitrogen. Only 20% of the 5% is oxygen wile 78% of the 5% is nitrogen.

It isn't the tires, it is the installation. Most places like Costco, Wally World, etc., don't properly torque the tires and often don't get them balanced all that well. I use a tire store that advertises that they use a torque wrench to properly torque the lug nuts and they do as I've watched them to be sure.

Matt

You need to study your physics. If you start out with 80% nitrogen and

20% oxygen (rounding to simply the numbers) and all of the oxygen leaks out, you have now 100% nitrogen, but your pressure is down by about 20%. If I now add air to bring the pressure back up to where I started, I have 80% nitrogen, plus 80% of the 20% air that I just added is nitrogen, so I now have 96% nitrogen and 4% oxygen am at my normal pressure again. If all of the oxygen leaks out again, I'm not down only 4% in pressure. So, I add enough air to bring me back to normal pressure. I now have 96% nitrogen, plus 80% of the 4% air that I added, which gives me 99.2% nitrogen. I will asymptotically approach 100% nitrogen, however, even after one cycle I have as pure a nitrogen fill as the Ford article claims was adequate.

Matt

Ed, I think this is a lost cause. Folks that get their tire information from Costco surely aren't going to understand even basic physics.

Matt