On Thu, 02 Jul 2009 19:50:17 -0400, John...same as yesterday.
wrote:

The local Toyota place will fill all the tires with nitrogen for $30.
Is it worth it? Thoughts?

Well, consider this - regular old air is 78% nitrogen, 21% oxygen, 1%
other gases and water vapor.

The advantage of nitrogen is that it won't diffuse through the rubber
because the molecule is bigger.

Personally, air is cheaper and mostly nitrogen anyway.