This is what the oil pan looked like. The tech said when he removed the drain plug just a little tream of oil came out, due to the blockage of the sludge. I personal have removed a drain plug from a 98 BMW 528 to have nothing come out. I poked a screw driver im the hole amd broke through a crusty sheet and then the oil came out. Just imagine what all the small orfices in your engine that require sufficiant oil to work are going through.