SHALOM!
Sorry, Neil, no idea how much they make of it, yet. That's one I've wondered, too. What ever it is, it be purely profit.
There have been recycled lube oils on the market for a few years, but they always keep a very low profile about it, because of the sadly low understanding of the consumers.
Oil does not wear-out; additives do, but not the oil. That is correct, sir. Navy ships carry tens of thousands of gallons of lube oil for the many engines and equipment. On our ship, both engine rooms continuously filtered it, stopping only long enough to clean the huge mechanical filters once during each 8-hour watch.
We never had more than a few specs of contaminates in the filters due to the severity with which we knew was required to keep a war ship battle-ready. Because of that training & understanding, I built and use an auxiliary 10-micron filter on my pick-up to eliminate the soot inherent to diesels
Clean oil is nearly clear like water - much lighter than amber, a color so faint that it's difficult to see. Additives and contamination are what ya see on the dip stick.
Back to you in the booth.
