Originally Posted By: Virtus_Probi
0.01 TBN for the "5-30"...wow!
They must be removing the detergents from the used oil somehow before bottling...unless the source is used non-detergent oil?
I can't imagine why some [censored], fly by night outfit would bother taking anything out of used oil before rebottling it...
My guess is that it's some sort of used industrial oil, such as the type you might find in very large engines, like in giant ships, etc.. or diesel power backup generators, etc.. The silicon, copper, iron, etc.. in these oils strongly indicates that is has been used in SOME kind of application.