I just wanted to say that my bro got his oil tank CPU stabilized.
Unfortunately, half the innards of a CPU can't be in oil (ODD, HDD, Powersupply) but he's got the mobo in there and once he secured the heatsink properly it does stay cooler than it would out of oil. He played on it for about 10 hrs straight and it was sitting at 44ºC (I think) what is that in ºF? About 110ºF? My CPU on my workstation is currently running at 113ºF but of course I'm not doing anything process intensive.
Some power supes seem to be able to run submerged, but they also generate most of the heat (you can see plenty of little heat shimmers through the oil.
The bubbler also helps to cool the oil, plus it looks nifty. My bro also just replaced the fluorescent with blue LEDs.