Oxygen - duh!

 

there is increased wear with overfilling your tires too. Max pressure on the tire is around 40psi so putting them right at that i don't think is a good idea.

 

The air we breathe is more nitrogen than oxygen. 21% Oxygen, 78% Nitrogen, 1% Other gases.

 

Believe it or not, I actually do know what air is. The question still stands. Compressed air not only has primarily Oxygen and Nitrogen, but also has a fair amount of water vapor. A mix of Nitro fill and compressed air will have an increasing amount of water vapor and oxygen in it every time the tire is topped off with compressed air.

Does that make it any clearer?

 

I, too, was being sarcastic. I do air cavity analysis as part of an aging program on detonators, and can resolve the less than 1% of Argon as well as the minuscule amounts moisture, CO2, etc.

 

I called Costco and they'll replace and re-fill with Nitrogen for FREE.

 

*with membership

You don't have to had purchased your tires from them? Costco4lyfe.

 

I've been quoted $85 from a dealership in the past to have nitrogen added. I LOL'd.

Allen Tires gives me free nitrogen since I've purchased tires from them, but it's no more than $25 otherwise.

 

If I could get a Nitrogen fill for free at Costco, that would be a simple decision. I may give them a call.

Dave