Originally Posted by seedubxj
I would NOT use 4oz in 5 gallons. I almost feel that 2oz is too much (for my tastes anyways). Start with 2, and you can adjust up to fit your tastes as needed.
It totally depends on the strength of your extract. I made my own, and the first year (just before I wrote this page) it was only sitting on the beans for a few weeks. I stress to add/stir/try until it's where you want it.
My current stash of extract has been sitting on beans for over a year now and is quite potent requiring much less.