The obvious and dumb question: Do you have the proper pressure set on all tires?

yep. checked and rechecked a ton of times.

+11ty billion.

Your missing the point of nitrogen. it's not to be 100% nitrogen, it's to eliminate the water and oxygen which cause corrosion on your wheels and valve stems and also drastically alter tire pressure as the tires heat up. Water has something to the effect of 500X more pressure in the range from 32-200 degrees, if you have 30psi and you have 1 tbs of water in your tire, the pressure could go to 50psi's and potentially becoming a safety issue.

I completely understand the physics.

If you have tbsp of water in your tire you're not filling with air. You're filling with ridiculously humid air or your valve stems are bad, in which case filling with nitrogen isn't going to help you anyway.

This is a street car under street conditions. It's not worth the effort unless you're looking for repeatable conditions on a track and you're trying to control variables like a race team.

I guess all those airlines that are filling their 747s with nitrogen are just wasting time and effort? Or those $20,000 tires on F1 cars?

There is a reason. Is it worth the hastle? Don't know. Does it help? I'm sure it does or otherwise it wouldn't have made it big time in the aforementioned industries/sports.

My dealer offered it for free and I have absolutely no intentions of refilling my tires with air. It's free and technically I would not even need to bother with it as the pressure does not change (to a drastic point at least). I'll let my dealer check my pressure and refill with nitrogen if needed every time I bring the car for an oil change...

I don't drive a 747 or an F1 car to work.

I'm outta this thread.