Originally Posted by OKC-XFR
Regular atmospheric air is 78% nitrogen, 21% oxygen and 1% argon -- so when you fill up at a pump or with your compressor, you're putting in over 3/4 nitrogen. There are claims that pure nitrogen is more stable, but I don't see how that extra 22% would make that much of a difference. But like MikeR said, if you get a flat, get it towed - you'll save $$$ by not having to replace your TPMS that was ruined by the fix a flat goo.