Not trying to be a wet blanket, but is there a performance reason that you are going with oil immersion or are you doing it for the look? Oil immersion has a lot of dangers and from everything that I have seen does not give any real advantages over simple air cooling.
Are you going to have your connections immersed as well? (Keyboard, network, sound card jacks) Could make for messy hands if you have to reach into the oil to connect things
