Again, I don't know whether the Nitrogen will help or not. I guess I won't know for a long while or may never know for sure. I am/was hoping to get feedback from someone that has used it for a while.

They put a Nitrogen measuring device (looks like an electronic tire pressure guage) on one of the tires after the process and it registered more than 96% Nitrogen.

I watched them do the filling. They hooked up a hose to each tire. The air was removed until there is only 3psi in each tire. The tires are then refilled with the Nitrogen. Then the tires are deflated again until 3psi, and then reinflated to the proper pressure.

With many trying to squeeze every ounce of MPG out of their vehicle, I would have thought this was a good idea. And sometimes the numbers/specs don't tell the whole story - take for example the EPA mileage estimates for the Honda and Toyota Hybrids. Many in the forum are greatly exceeding mileage estimates.

I guess if the best results I get are just keeping the tires at constant pressure for 3-4 months, it will have be worth it.

I will check the tires monthly for the next few months and post the results.

Comments from anyone with hands on Nitrogen experience would be appreciated.