I have been having problems maintaining proper tire pressure due to the recent temperature changes. I stopped by my dealer yesterday to discuss this with my service tech and she recomended having my tires filled with Nitrogen. Apparently, I will never have to check my tire pressure or refill the tires unless I get a flat.
As we all know, tire pressure is key to increased gas milage and i wasn't too expensive so I had it done.
I will let you know if it works.
Here is the link:
http://www.whynitrofill.com/index.htm
David