That's interesting. It doesn't surprise me that a solution exists for heavy-duty industrial-scale applications. They will have done the math and decided if it pays off in the long term.

But that's a long way away from this tinkerer's garage with a ridiculous assortment of internal combustion engines. If I understand correctly, my used oil will already have broken-down additives because of the contaminants.

I sure wouldn't mind a super-duper filter system on my engines. It would save some work. Maybe we'll see that in passenger cars some day.