Originally Posted by dflwshaft

Now for the nitrogen. I saw a poster in the shop stating that they offered nitrogen replacement. It had a big F1 Ferrari on it so being an F1 fan I had to ask. For $20 they did the nitrogen all the way around. Of course he explained all the benefits, but what made me do it was the constant and no pressure loss. That was a contributor to my tire wear so I was interested. What made me believe it was true was that I know F1 cars want precise constant pressure no matter if the tires are hot or cold as a part of suspension tuning. If it didn't work, they wouldn't use it. I was sold. They even stood behind the mod saying that it was a lifetime service. If I ever lost pressure, they would fill them up. That's also a great way to know if you've got a slow leak (something your tire pressure monitor system won't detect). Hey, it's worth $20 to never have to worry about tire pressure again!