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Old 07-06-2011, 11:20 PM   #4 (permalink)
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It's dry nitrogen tho, after all on average the air going in to your engine as as much water in it as gasoline as it enters the combustion chamber, so while I question if it's worth the cost, it does have an affect, airplanes use nitrogen in their tires to keep them stable, of course your car is not seeing the changes an airplane sees.
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