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I got a 7" sock 5 micron polyester filter from McMaster-Carr, cut the bottom out of a paint can, and hose clamped the filter in it. I lined it with another filter made from a T-shirt. With my cubee of oil 12" above the level of the paint can over a bucket, I siphon the oil through the filter. No heating, not much work. I change the T-shirt filter about every 40 gallons, and I've not needed to change the 5 micron yet. I've filtered 250-300 gallons since March of this year.
My oil sources are good, pure fryer oil, so no water ever gets in it. I still run a water separating filter in the car. I filter it colder than I run it in the car, and then I don't need to change filters in the car.
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