Inflating Tires

Originally Posted by crazy4oldcars

Lol, as long as you don't mind running around with green valve stem caps.

I never really understood this trend. According to advocates, nitrogen doesnt leak out because N2 molecules are larger than O2 molecules.
Air is some 80% nitrogen.
Once the O2 molecules leak out, there would be near 100% N2 in the tire.
Replace the 20% leaked with air, again at 80% N2, meaning the air in the tire is essentially 96% N2.
A couple of more rounds, and, for all intents and purposes, your running nitrogen in your tires, without paying anywhere up to $40 per tire.
Kirk B.