The OP said in post 1:
"We had been using a material called sintered metal fiber. It was a random mat of 316L stainless steel fibers all sintered together into a pleatable filter media. This stainless filter media ranged from 3 micron up to 100 micron in filtration rating. Since it was 100% stainless steel.'
"After one year, I changed out the Mobil 1 oil since the acid number started to creep up but have not removed the filter. I send a fluid sample out to Wearcheck labs in Cary, NC every 6,000 miles to see how things are doing. New Mobil 1 is very dirty. It is around ISO 4406 Code 23/21/18. My car has stayed around 18/16/13 throughout the test which is cleaner than new oil."
So this special MIL Spec metal media doesn't seem to be the same as the metal screen type material used in oil filters out there on the market for automotive engines, which are typically advertised to be able to filter down to 30-35 microns. And if the metal stainless fiber (not a screen) material he's talking about is able to keep oil cleanliness to an ISO 4406 Code level of 18/16/13, then it's way more efficient than even say an OG Ultra which has shown to not achieve an ISO code that low in the UOAs on this board with PC data. So this is something way more high tech than the simple fine metal screen filters used on race engines, etc. The metal fiber media he's talking about sounds like typical oil filter fine fiber sized synthetic media, but made of metal that can be cleaned and reused.