On 3/18/2014 1:48 PM, Stormin Mormon wrote:
On 3/18/2014 2:29 PM, philo wrote:

The new thing I've seen are service centers advertising nitrogen to
fill tires.


Although it is of course safe to do so...any tiny advantage it
could have would be offset by the extra cost. The service centers
seem to have a rather "inflated" cost for that feature.


Air is something like 79% nitrogen anyway.

It would be tempting to go into a tire place, and ask some kind of
question based on if the clerk knows the make up of air.

"I had my tires filled with nitrogen, and then got new tires. You
think there may be some nitrogen still in them? So maybe I don't have
to have them nitrogen filled again?"

I own a couple of Q sized nitrogen cylinders and a regulator that I've
used to pressure test refrigeration and AC systems, to blow cleaner
through them then to blow out the air so I can perform a triple vacuum
before filling with refrigerant. Nitrogen is handy for a lot of stuff
and having it on a service truck means never having a flat. I'm now
thinking I should inflate the high pressure spare tire for my Jeep with
nitrogen so it will maintain a constant pressure regardless of
temperature. ^_^

TDD