Here we go again..
WASTE OF MONEY!!!!!!!!!!!!!!!!!!!!
nitrogen is used ONLY because it is more stable than air for temperature difference, on the order of 1/10th of a psi to every 25..
The simple fact being, unless your a nascar driver, driving at 300 mph its useless, specially because most normal cars lose 1psi per month anyways.
Nitrogen is more stable because there is no water vapour disolved into it.
Air pressure fluctuates slightly in temperature changes when water vapour is disolved into it..
Nitrogen does not "escape" slower at all.. it will leave your tires at the same speed as regular air..
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