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Originally Posted by nicoliani
I need some oil lubricate that is 100% natural and free from chemicals.
As for this Ethylene Glycol or Propylene is not desirable.
If there is a question way I need to lubricate?
1. The pump will wear down if not
2. The pump will run more silent
3. It does well on anti-corrosion
I have tried with a cooking oil but after a while it rancid and the smell was not good. But it did a good job. After 6 months no algae or corrosion, as I had only this and destilled water!
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For the Corsair HydroCool and the Nautilus, PG of 33% was used for the very three reasona you had given.
Oils will break down over time with heat. I would have a concern with the oil that usually contains sulfur. The sulfur over time will react with the copper cold-block(s) to generate copper sulfate. Copper sulfate is a nasty product used in agriculture pesticides and requires protective clothing and should not be mixed or diluted with any other product. There is an EPA hazardous waste procedure for disposal as well. If you have a hot spot for the CPU that is being cooled, the sulfur dioxide is captured and converted into sulfuric acid. All this will float around in the oil.
The sulfur content will also react with aluminum. You will notice yellow gas bubbles over time in the cooling loop. Sulfur really likes aluminum. It will bond to aluminum very quickly. The rad aluminum tubes inside will corrode in time as well. If the cooling loop is purged and replaced with glycol and distilled water, even more reactions would occur since oxygen is present! Oil and water do not mix well.
Now, if the oil that is used isn't a refined petroleum product, like plant oils, then the cooling loop would be in great shape. If not, the cooling loop parts will degrade over time and could have leaks. Oil is a very good conductor of electricity too.