VERY long story below, read it if you care. Saw no one do this so thought I would share.
In short: add clean water to your WMO and mix it. If the water becomes disgusting, it means it absorbed filth from the WMO which a filter/centrifuge wouldn't be able to take out.
Throw away that water, filter it and enjoy your cleaner WMO
Here's a bottle of FILTERED wmo, the water became brown which is probably antifreeze and other crap, which would otherwise go in the engine.
Probably best to try a little bit first, if the water comes out clean you may have got a nice batch of uncontaminated WMO oil.
In short: add clean water to your WMO and mix it. If the water becomes disgusting, it means it absorbed filth from the WMO which a filter/centrifuge wouldn't be able to take out.
Throw away that water, filter it and enjoy your cleaner WMO
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Here's a bottle of FILTERED wmo, the water became brown which is probably antifreeze and other crap, which would otherwise go in the engine.
Probably best to try a little bit first, if the water comes out clean you may have got a nice batch of uncontaminated WMO oil.
Most people here use either a filter, or a centrifuge. Basically this removes particles from the WMO; things that float inside there. Think metal shavings, sand, dirt etc.
What this will NOT remove is dissolved things. For example if we have water with sand, and salt, as the salt dissolves, it becomes "part" of the water, so the filter/centrifiuge only removes the sand, none of the salt.
Back to WMO; antifreeze / brakefluid contaminate the oil with silicates and other salts, you cannot filter / centirgute this out. But because antifreeze & brakefluid are both water solutable, we can use water to remove this crap.
The problem with this crap (silicates and other salts) is that they cannot be burned and have a very high melting temperature, so once they get inside the engine and its difficult to get rid of them.