quote:

I have seen claims that tires hold their pressure longer with nitrogen. (I would like to see proof of this, ie side by side with two identical wheels and tires, one with air one with nitrogen)

I will follow up on this. The front tires have nitrogen. The rear tires have air from my shop compressor. No additional dryer is on the compressor. I do drain plenty of water out of the tank though.

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Originally posted by Duane88: I think there are two types of available Nitrogen, dry as used to purge A/C systems and water pumped, more readily available. Wonder what you've got in your tires?

I think, emphasis on think,, common compressed air gasses are obtained via cryogenic distillation which probably requires dried air at input.

Tim I believe you are correct. With the exception of compressed air itself, all the pure gases are obtained by distillation. The process requires and produces pure dry gases.

These are the same processes the petroleum guys use to separate the fractions in natural gas, ie methane, ethane, propane, butane etc.

My age is showing, see class 1 water pumped nitrogen on this site! Class 2 is not a good one for tire inflation. Before one can extract nitrogen from air by cryogenics it has to be compressed!!!


https://navyaviation.tpub.com/14329/Nitrogen-
436.html

Logic tells each point is moot, the amount of gas one would have to pass through seems to me would be astronomical to contain enough oil or water after the extraction process to cause any harm. The powers that be in the refrigeration industry always wanted to use oil pumped nitrogen, it was just the thing to do, never really wondered why. Perhaps it was because most of them use a central system and continuous refilling may cause accumulation.

Funny though, oil in an absorption system is a total disaster!

You boys members have gone to high tech for my simple mind. I am doing plain hands on comparison that Steve VW suggested. Results will follow.

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Here is a little write up from Tire Rack that is neither for nor against nitrogen in tires.

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...Overall, inflating tires with nitrogen won't hurt them...

Duh… air is 78% nitrogen.

Maybe it is the other 22% that is important. Like the 22% fat in a hamburger, or do we buy ground round with only 10% fat?

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It is in there and I will report back in the future.

Nothing like one in a row research to prove an hypothesis!

quote:

Originally posted by Kevin:
Maybe it is the other 22% that is important. Like the 22% fat in a hamburger, or do we buy ground round with only 10% fat?

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It is in there and I will report back in the future.

"After every number they'd pass the hat, no ones getting fat cept Mama Cass"!!!!! M and P always has an answer!!!!

"All the leaves are brown and the sky is gray"

I’m thinking about putting helium in my tires. Lighten the load and get better handling and fuel mileage. Would also reduce your taxes as some states base their tax on GVW.

I believe this is a million dollar idea!

I’d be willing to sell franchises to those so inclined to get in on the ground floor of a new venture.

Get you request in early as the demand is high and quantities are limited.

OK, enough is enough!!! The optimum fill gas is methane!! The green folks want to stop us from eating beef so there are fewer cows passing gas into the atmosphere lets put plastic bags on their butts and capture any passing gas. Then we can enjoy a hamburger without guilt. Everyone can capture their own expulsions, compress them and have free gas to fill their tires, perhaps ones dogs, cats and spouse would also contribute. Granted methane is a heavy gas and will not float your Barth, but you would be helping keep the planet green!

Please note how the crude words for passing gas and behinds was avoided!!!

All this is making me feel green...