That dude is crazy I dont know what the hell he is tryin to do with Mineral oil. Maybe he wants to eat his computer.
But, what i did with my PIII 650E. Was added a couple of fans, one on each end of the case, and another right near the CPU facing down on it and the GF2. Then turned the poop up. It wouldnt boot after 780 MHz unless i turned up the Voltage. But now its up to 806 and hasnt crashed or froze in months (Voltage is @ 1.75v up from 1.65v).