Originally Posted by Ihatethedukes
Okay, think about it this way Chozart, what's the difference between the stock fan burning out and no fan? None, except you get better cooling for the duration it works. I'm still not sold on this whole "It'll burn out because of the viscosity" deal.
Not the CPU. The fan motor will burn, since it simply does not have enough torque to handle the thickness of the oil. Fans are generally designed for high RPMs in a thin environment (air). Think about car engines... for a high speed, horse power is needed, while for hard labor in tough environments, torque is much more important... Hence, for the latter, Diesel engines are often used given their insane torque.
What is needed in this environment is a low rpm fan with a motor that can handle the thickness of the oil... something like a stirrer to keep the oil moving.
I don't think a fan on the heatsink will make any difference... I am just suggesting a fan anywhere in this rig to keep the oil moving, so that the oil near the hot spots on the motherboard does not just stay there.