Just like the title says.How long is nitrous good for when it is just sitting in a bottle?I filled my bottle last summer and blew my trans i'm changing lots of stuff on car and wont even use car until next summer will the nitrous still be good and ok to use?

 

It will still be fine, nitrous doesn't go bad.

 

There should be an expiration date on the bottom of the bottle.

 

mine has a born on date

 

There is no date on bottom, the date (near the top of the bottle) is the manufacture date of the tank itself. It is used because DOT requires tanks get tested every 5 years. Nothing to do with the nitrous in the bottle.
Like GM said, the actual Nitrous dosen't go bad.

 

i'm pretty sure he was jokin

 

Yeah I was joking.
I had that little 'winking' smiley on the top of my post.

 

I have no clue how long N02 is good for, but N20 is good for ever

 

Ha, to prevent that "bitter" nitrous face your car might make at the track?

 

yeah, nothing worse than "skunky" nitrous