Hi all, been lurking for a while....great site. My rig, a 85 ex-mil Blazer was sold to me with mineral oil used as brake fluid. I am now experiencing comlpete brake failure. I've changed the master cylinder and bled the system, and still no brake preasure. Anyone have ideas if the mineral oil is the culprit? The PO completly flushed the system so no DOT fluid mixed with the mineral oil. Not sure as to why he decided to use mineral oil in the first place.