Oil cooling is more effective when everything is dunked. I saw an office setup where the PC was put in a mini aquarium with plastic fish etc inside. The heat from components created some nice bubbling effects. Problem was fans eventually stopped spinning due to thickness of oil creating extra work but no big deal since the oil removed heat quickly they where redundant. The other downside was the oil corroded some rubbers and plastics meaning some seals in the tank leaked. Ill see if i can hunt the logs.