Tire is low .. where to fill in sj ?

[Cloudsurfer]

Originally Posted by nefarious986

It maintains pressure under heated use much better than regular oxygen. Less checking & maintenance plus some minor stuff with better mileage since your tires are always 'perfectly' inflated.

I could fill it with air, but considering I got this car 8 months ago (directly from Porsche, filled with Nitrogen stock I think ) and haven't need to deal with tire pressure, I would like to keep using Nitrogen.

I called a few local shops though, and they had no idea where I should go so I thought maybe a fellow P owner might know.

I think one suggestion from somewhere was Costco. Will check tomorrow. I'll let you guys know.

As have been pointed out, "normal" air is 72% Nitrogen. Your tires are not filled with Oxygen. I HIGHLY doubt your tires came filled with Nitrogen from the factory, or dealer for that matter.

To get into the technical side of this, we use Nitrogen in aviation due to its inert nature, on the ground here, particularly in a street car, there is practically no benefit. Maybe if you can get your tires filled for free, sure- go for it. But if you're going to pay a premium, its ridiculous, and yes, it's a fantastic profit center for any tire shop.

If you wanted to have "Nitrogen filled tires," you would first have to evacuate the air using a vacuum pump, and then pressurize with Nitrogen. I am sure no tire shops are doing this. Now, for remote reservoir shocks, its a requirement- again due to Nitrogen's inert nature, so that's a different situation.

Long story short, I would not worry about. Just use air, though preferably dry air.

Patrick

[Jaxonalden]

nefarious986,

As you can see from my third post that nitrogen is not worth the time or cost for the little to no benefit you'll receive. Just use free, dry air and take the money you would have spent and buy some beer and invite us over to talk cars.

[gregdacat]

I believe chosing to use N2 in your tires is no different than any other mod/hack. Some people like it, some don't. Some swear by desnorkling. Some say it is a waste. Some spend big buck on the stickiest tires, other say as long they last and look good, a tire is a tire. You pay your money and you make your choice.

Would I pay for N2 if it was $7.50 a tire, heck no. But I get it for free, so what is it going to hurt and it just may make a difference even if slight.

[Tool Pants]

Do the valves have green caps?

[gregdacat]

Originally Posted by Tool Pants

Do the valves have green caps?

My wife's valve caps on her Goodyear Wranglers are green. My valve caps on my Box are black. (My request)

[944boy]

I think the whole nitrogen thing started because compressed Nitrogen is inherently 'dry'. Compressed air typically has moisture. Continual filling with moist air will cause condensation and the water can cause a mis-balance and rot from the inside.

All gases obey the gas-law and expand with heat.

If you are racing and constantly adjusting tires, a small bottle of nitrogen is cheap and more portable than a 12v compressor. its win-win.

[Kirk]

BTW, I was cruising the Harbor Freight website today and noted that they have 40 csf and 20 csf nitrogen systems specifically for filling your tires. Includes the bottle, stand, regulator, hose, and tire inflation attachment. When I was at Harbor Freight later in the day I asked out of curiosity and they said they didn't carry it at the store, so you might have to get it off the website. Just FYI.

Kirk