Good grief, almost 500 comments now and it appears this thread is turning into a pissing match as well...
Guess some folks have way too much idle time on their hands.
Interestingly however is that the diesel oil I use in both my M9000 Kubota's don't turn 'black. immediately nor does the oil in my 3406 NZ engine in my International Eagle conventional nor my 97 Ford 7.3 pickup truck for that matter. I does start to get some opacity almost immediately but turn black, nope. They all get the same lube oil, Shell Rotella T6, 5-40 flavor with the addition of 1 fluid ounce of Nano-Borate (per quart of oil at change time and new filters as well) at the oil change interval, which is yearly in the tractors as well as the pickup and Blackstone Labs tells me that when I submit a sample, the oil is just fine. I have to assume that Blackstone knows what they are doing as they are an accredited lab.
Only lube oil I have ever seen that turns almost immediately black is the lube oil in a DDEC engine in the Detroit 60 series it turns black almost immediately. The only reason I can equate to that is they have more 'blow by' that other engines. You might chew on that for a while and like I'm doing, I'll follow along... Even at 74, I can absorb things. Far as spelling goes, It's a forum, not a spelling class, if I can ascertain what the word represents, I'm good with that.
Have a wonderful day, over and out....