Nice response.
Some people do not know and will try it because they heard about some talking about it. Not everyone will research what can and cannot be done. I just looked up the two common types of tubing that are used in most cooling systems and pointed out that both are only suitable with water base cooling.
Why would you even bother with oil for cooling? You can't run it through a radiator and when running higher end components, it'll just overheat.
Hell, just a single radiator with a silent fan, decent cpu waterblock, and a low powered pump will out perform it easily. High end air coolers like Thermalright will probably do better than low end watercooling kits and obviously oil cooling.
the reason why we were talking about oil cooling on a pc to begin with is because of leaks
That's why you leak test your computer without it running (jump start psu through paperclip + 24pin for the pump) for at least 48 hours if not more.
Leaks don't magically happen unless you're using terrible compression fittings like Thermaltake or you're feeling risky and run your loop without any clamps. People have done it successfully for long periods of time and still haven't had a leak; you better hope you don't have any sharp turns with your tubing.
You should be running distilled water in your loop with maybe some biocide or silver coil if you don't want bacteria and shit growing in there or you can waste $20 for a bottle of coolant that you're going to be replacing in 6-8 months. So say it gets on your video card, you can just shut off everything immediately, soak it in alcohol and dry it out. There's been numerous amounts of people who have done that with success.
The "danger" of watercooling is greatly exaggerated; it just requires fucking research to be done before hand. Xtremesystems has an
amazing watercooling section that I've looked at for the past four years.