At what gravity/point does wort need O2 vs shake?

[garcia]

I shake to aerate for a good 4-5 mins to aerate, and was wondering at what point is O2 needed?

 

[Ital]

Check out this article. In general, 1.065

http://morebeer.com/category/wort-oxygenation-aeration.html


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[b-boy]

I always use O2.

 

[calvey]

Ideally always use oxygen if you have it.

 

[cjgenever]

Since I don't yet have oxygen I use a venturi tube, pour my wort back and forth between buckets, and add a touch of olive oil at flame out (EVOO is for anything 1070+). the oil can negatively affect head formation and retention if too much is used, and only a ridiculously small amount is needed. if I had oxygen I would use it for anything above 1060. I think 1065 is a good recommendation though. anything below that you'll do fine with agitation.

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[cjgenever]

You can make a huge beer without supplemental oxygen, but it just won't be as good as it could be. and you'll need to over pitch. I've hit 1100 without supplemental oxygen and it came out great, but there were undertones present from the yeast's stress. they would have been hard to notice if you weren't looking for them.

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