Postby trinijanus » September 14th, 2009, 1:59 pm
If you can afford it and want to have bragging rights while having a cocktail a la "I filled my tires with Nitrogen today"...then go right ahead. We're talking about the application of Nitrogen for tires under extreme conditions, like space shuttle landings...F1 racing...etc. Yes...there are major benefits to vehicles under those extreme conditions.
But the benefits to normal cars under normal conditions are infinitesimal. I mean, come on...do you pressure your tires in 1/4 psig intervals so as to not have any thermal effect? Sure I wish my lil old stock Civic was more like an F22 Raptor...but filling the tires with Nitrogen won't make it so!
If you really think about it scientifically, one of their big sells is that Nitrogen leaks out slower than oxygen, therefore helping you maintain proper inflation for longer. But then, by that same token, since air is 78% Nitrogen and Oxygen permeates through the tire wall faster than Nitrogen...then over time, wouldn't you NATURALLY end up with MORE Nitrogen in the tire than Oxygen?
Another big sell is that there's water vapour (the real culprit in this whole shebang) in the compressed air that could rust your rims, or the steel in the tire casing...um...seriously...most of your cars have alloy rims...so...rust? And by the time the steel in the casing rusts...if you're still running those tires...then you must be driving less than 20 miles a week...because normal tires will need to be changed because of tread wear loooooong before the steel in the casing rusts.
And oxidation? Of the rubber? By the Oxygen inside the tire? Dude...you ever compare the condition of the rubber INSIDE the tire to that OUTSIDE the tire? Oxidation will hit your tire from the outside WAY faster than from the inside. Are you going to wrap your tire in bubble wrap on the outside to prevent oxidation too?
Just check your tire pressure every time you go to fill up gas! And if you're doing so after driving for a while, then adjust the psi on the compressor to a few psi above your normal setting to account for the tire being hot. Basically...unless you have a money tree at home...or you routinely drive your car like you were on salt flats trying to break the world land speed record...there's no critical reason for you to fill your tires with Nitrogen.
P.S. I'm about to go rub my tires with snake oil to keep them supple.