We hear about filling our car's tires with nitrogen from time to time, and it's not always good news. Today, we feature an announcement from GoNitroTire (available after the jump). Guess which side of the fence they sit on.

GoNitroTire's founder and managing partner, Ken Lawton, wants everyone to use nitrogen in their tires and, on the surface, doing so seems to make sense. GoNitroTire's UltraFill99+ & TireXtender nitrogen inflation inflation technology is now available from the company's website. And who wouldn't want a gas in the tires that takes longer to leak out, making your car more efficient without any modifications whatsoever? NASCAR and the military use nitrogen tires, so why shouldn't the average Joe reap the same rewards? Well, as we wrote in 2006, Consumer Reports puts the kibosh on nitrogen in passenger car tires. NASCAR vehicles can make use of nitrogen's benefits, but in your Prius or Mazda2, keeping the tires inflated with air to the correct PSI will work just as well. Who out there has tried nitrogen in your tires? What were your results?