Re: Hydrogen in tires-why?
A couple of reasons. First, dry compressed nitrogen from a tank has much less humidity than air, so you will have more consistent tire pressures over a wide temperature range, although the difference will most likely not be noticeable.
Second, nitrogen diffuses through a membrane slower than other gas molecules like oxygen or carbon dioxide, which means you won't have to fill your tires as frequently. Again, I highly doubt you will notice any difference. Air is already 78% nitrogen.
And third, nitrogen is non-flammable.
It wouldn't hurt to get your tires filled with nitrogen, but I wouldn't pay for it. There are places (like Costco) that will fill your tires with nitrogen for free.
// Interpol / 2014 981 Cayman S / White
// PDK / PASM / PTV / SC+ / PCM / PDLS / LDP
// Borla cat-back exhaust / TiKORE titanium lug bolts
// 2009 987.2 Cayman S / Carrara White / PDK / traded in 06.2013
// 2006 987.1 Cayman S / Speed Yellow / 6MT / traded in 08.2009