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How often do you get the air in your tires replaced?

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I think the idea of Nitrogen is that it is supposed to leak slightly slower than normal air. The tire rubber is permeable to gases, so gradually the air leaks through minute pores in the rubber causing deflation. Supposedly, pure nitrogen leaks about 20% slower than air.

However, my experience has been that a properly fitted tire will hold its pressure for about 12-18 months, so I can't imagine that Nitrogen filling is of any value. Anyway, you should be checking the air pressures ever week or so - and it's easiest to do it at a gas station with the air filling compressor, so you can actually refill at the same time.

Helium, lol, that stuff will pour through the tire about 10 times faster than air. (That's why helium balloons are made from aluminium coated plastic - rubber is so permeable to helium that the balloon will deflate in hours).

You know, you could probably sell helium to people. High price, high profit, and it needs refilling every week. And it's lighter than air, so will help reduce the weight of your vehicle improving acceleration. Right, I'm off to buy a helium pump. 😀
 
Originally posted by: Cattlegod
make sure you fill your headlights with new air too, the old stuff can get dirty and make your lights dimmer than they should be.

I just had my blinker fluid and headlight grease replaced. They guy told me if someone asks me to change my headlight air they are trying to scam me because its grease and not air that gets replced in the headlights. I mean I was born at night just not last night and I dont want to be taken if I dont have to get the air replaced yet.
 
Originally posted by: Mark R
I think the idea of Nitrogen is that it is supposed to leak slightly slower than normal air. The tire rubber is permeable to gases, so gradually the air leaks through minute pores in the rubber causing deflation. Supposedly, pure nitrogen leaks about 20% slower than air.
I kinda doubt that. Air is ~80% N2 and ~20% O2. The size of N2 and O2 molecules is damn near the same, so I don't really see why pure N2 would leak slower than regular air.
 
Originally posted by: Baked
Originally posted by: Xanis
Originally posted by: Ktulu
$30 for air????????????? Dude, its FREE!!!

Dude, you could go buy a cheap air compressor from Sears for $30.......

This thread is a joke in case you haven't figured it out after reading the initial post. :roll:

Well thank you Captain Obvious, you've saved the day once again.
 
Originally posted by: CadetLee
Helium is lighter, though..reducing rotational mass -- improves acceleration and fuel mileage.

Not to mention that's unsprung mass, so it counts like 10x as much! :Q
 
I was 16 and looking for a used car for my first car long ago. At that time and place air-conditioning in a car was rare and not really an issue that crossed my mind. I saw an interesting coupe in the want-ads that in the list of features included something like "new tires, w/ factory air, ..." I spent a couple of weeks wondering why there might be an advantage to factory air in new tires before it finally clicked. The few people I asked responded much like many of the people here, so I hope the OP wasn't really serious.

BTW Falcon, in later years I did drive some heavy mining equipment where the tires were partially filled with a calcium-carbonate (IIRC) solution to lower the center of gravity. Same thing is now used for the dyamic-balancing ring is some front-loading washers,

nBd
 
Originally posted by: Heisenberg

I kinda doubt that. Air is ~80% N2 and ~20% O2. The size of N2 and O2 molecules is damn near the same, so I don't really see why pure N2 would leak slower than regular air.

I don't either. 🙂

Oh well, just goes to show that no one ever went to the poorhouse for overestimating the stupidity of the American public. 😀
 
Originally posted by: aircooled
might as well have them replace your muffler bearings while their at it 🙂

That reminds me I needed not only the exhaust fixed but a new water pump for my 67 VW bug and a Head Gasket set for my 83 Corvette.
 
did they actually ask you that? i mean...wow...i know i'd just start laughing uncontrollable if a "mechanic" asked me if i wanted to change the air in my tires...
 
I really am not sure if this i some sort of joke or parody.. that makes no sense whatsoever.

my last set of tires had the same air since they were installed. I had them 4 years never added or changed air.

it's freaking air!
 
Originally posted by: funboy42
Originally posted by: aircooled
might as well have them replace your muffler bearings while their at it 🙂

That reminds me I needed not only the exhaust fixed but a new water pump for my 67 VW bug and a Head Gasket set for my 83 Corvette.

😀

 
You should have them refill the air-conditioning system with cold air too, you don't want to run out during the summer.
 
Originally posted by: CadetLee
Originally posted by: jagec
Originally posted by: Scourge
Oh, and you should change your air every season. Winter air is heavier and puts more stress on your U-joints and axles, not to mention the transmission and engine. It gives worse gas mileage as well.

I do mine in March and again in November.

It's best to do a full flush/refill if possible.

Of course, some people send their air off to be analyzed at a lab, and thus they are able to safely extend their change periods.

Helium...that's great...not only will it cost more, it will leak like crazy and require you to go back every week for a refill!

Helium is lighter, though..reducing rotational mass -- improves acceleration and fuel mileage.



FTW!!


BTW, use only PURE helium, as it will also make the car lighter,( like a helium balloon), which helps with gas mileage, tire wear and improves handling...
 
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