easy_rider911 said:
Why would eliminating the oxygen and inert gases from your tyres make any difference, especially in a road car? Nitrogen makes up about three quarters of the air anyway...

Bigger N Molecules pass thru the anti-leak membrane of the tire less easily requiring less attention, or less time spent checking, to air pressures.

Oxygen decomposes rubber faster, less O2 means longer lasting tires for museum cars.

Both great reasons, huh?

I can also imagine the scenario where I put N in my wife's tires because she NEVER checks/has checked the air pressures. I'll check them AND I WILL DRIVE TO GET THE N put in (can't dilute it with air, gotta go back to the N station). Yeah riiiiight!