Michelin recomends inflating tires with nitrogen. What about Argon? I
got a bottle of argon I use in Mig welding aluminum. Isn't argon
better than Nitrogen? What about the common 75% Argon and 25% CO2
welding mixture?


I'm not sure about the other aspects, but nitrogen is about 1/3 the
price.

And ordinary compressed air is already 80% nitrogen.
But the oxygen and ozone, along with a few other gasses does
accellerate the deterioration of the rubber, and the nitrogen stays in
better than the rest (co2 included) Also more temperature stable,
pressure-wize.


Yeah, I forgot to mention the pressure aspect until after I hit send. But
a
lot of the racers love it because they have less pressure rise as the
tires
heat up. Probably the best reason I can see for using it in a auto.
Especially in summer.


When I saw that 8 replies were already posted, I was sure that someone had
provided a serious response; but it was not bo be.

I have long forgotten the periodic table, so I used Wiki. Argon is shown as
atomic number 18, so it is a good sized molecule--although possibly smaller
than N2--and is supposedly used when Nitrogen is not sufficiently inert.

It seems like it should work just fine, even if mixed later with dry
nitrogen or even with air; but I would call the tire manufacturer and ask.

Peter