[Rick J]

Originally Posted by Alan Roehrich

Not sure what you mean by separation, but I stopped using Driven because with every grade and type, both break in and race oils of various weights, we ended up with a ton of thick, grey, gelatinous slime in the bottom of the oil pan, regardless of which filter we used, the premium Delco, the Wix race filters, and K&N. It looked a lot like molybdenum disulfide paste. Can't say if it ever really hurt anything, but I certainly didn't care for it.

Same reason I stopped using it.