How much oak are you planning on putting in? 8 weeks is likely too long- you'll want to taste-test it as you go. Another option would be to use oak cubes, which release their flavors more slowly and evenly than chips do.
Edit: This thread
just popped up in the new posts feed- you might find it interesting. There's another oaking thread around somewhere, too.
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Last edited by dwarven_stout; 04-25-2010 at 04:00 PM.