Only thing I did not like about the Nitrogen was that my dealer had put these cheesy ugly plastic green caps on the tubes. It was the first thing I saw when I looked at the my polished alum wheels..... I told them no way I was leaving there with green plastic caps like that. They had some nice stainless caps they changed out that had N on the top end to represent Nitrogen.

http://i55.photobucket.com/albums/g143/connjr/005-6.jpg

http://i55.photobucket.com/albums/g143/connjr/003-4.jpg

http://i55.photobucket.com/albums/g143/connjr/002-7.jpg

You'll see a remarkable lightness in your wallet.

WE DID IT :thumbup: :wub:

NIce Thank's for the info.

Costco has free nitrogen.

Why not use Helium it has a root mean square travel rate of 1370 m/s this is 14 times faster than nitrogen plus it will make your car lighter because this is what make balloons float.

Mr. Barnum was right!

WARNING:
Only thing I did not like about the Nitrogen was that my dealer had put these cheesy ugly plastic green caps on the tubes. It was the first thing I saw when I looked at the my polished alum wheels..... I told them no way I was leaving there with green plastic caps like that. They had some nice stainless caps they changed out that had N on the top end to represent Nitrogen.

Those metal caps will react with the tiny electrical charge generated by the TPMS and bond themselves to the valve stem, you will not be able to remove, after the covers were stollen from my Acura RL replaced with metal ones, 3 out of four could not be removed, had to replace entire TPMS valve assembly

So any suggestions? I have the metal ones with the "N" on the top of the cap as well. Should we unscrew them every few days or week to make sure they don't fuse or bond to the valve???

That should help lessen the bonding issue.

Put some dielectric grease on the threads, they won't bond/fuse together.

check if they are really chromed plastic, not metal, It is from galvanic action of dissimiliar metals, anything plastic is fine.