Nitrogen and the Eight's tire sensors
 

Do you guy and galss Eight’s tire sensors flag as soon as it it gets less than 70 degrees while running Nitrogen in your tires? I am wondering if I need run a little higher PSI than spec to compensate when the weather gets cooler. As soon as I get up to highway speeds the tires warm up and the sensor goes away.

I thought the point of inflating with nitrogen was to combat the very problem that you're describing. Are you sure they didn't just put really moist air in there? :/

You may have verified already, but maybe take a reading before you head out and after you park to confirm that it's not just a faulty sensor. I know my gf's 2008 Sentra already reports low tire pressure just from hitting a bump wrong.

if the sensor says the pressure is low then its probably just at the edge of ok in the first place. put another half pound in the tire(s) that is low

just check your pressures lol. if the light is coming on it means a tire is down to about 25 psi, destroying your tire.

Since the tires are not installed in a vacuum or Nitrogen saturated environment, it would be difficult to guarantee 100% Nitrogen inflation without bleeding off the tire pressure and pressing it up about a dozen times. Even then, there will be something else in there - just diluted.

and since air is about 80% nitrogen to begin with its a stupid thing to pay for. When your tires get low, it must have been everything other than nitrogen that leaked out so fill them up again and overall you have more nitrogen density then you started with. over a summer you will probly top off your tires 3-4 time making them pretty much 100% nitrogen filled anyway. Dont pay for bottled air

re: bottled air

http://kiddiescornerdeals.com/wp-con.../The-Lorax.jpg

:scratchhe I don't think so, bud. If anything, the heat cycles, and the fact that your tires are black, will ensure that you have a homogeneous mixture of gasses in your tires. Nitrogen has no qualities which would make it less likely to leak from your tires than the Oxygen or Argon components of air.

i dont get it. Its one of the 2 reasons that you fill tires with nitrogen, less pressure change with temperature, less pressure loss through the sidewall of the tire (permeation). and doesnt homogeneous just mean equally mixed up? even though all the gases in air are equally mixed up in a tire, that is black, nitrogen is a larger molecule that leaks through rubber much slower than oxygen.
over time, your oxygen in the tire will leak out faster than the nitrogen leaving a higher percentage of nitrogen in the tire. this cycle will continually raise the nitrogen content as long as you own the tires. i was only being sarcastic on the 100% part, thats impossible.

Nitrogen filling tires is a gimmick. Don't get duped.