filled, maybe its possible that the oil was not draining out of the turbo(s) fast enough, and pushing oil through a worn compressor seal? Either way the oil most likely came from the compressor seal/bearing area which means its most likely worn anyway...just thoughts though. Some people really dont know how much oil to put in...I changed the oil on my friends new NA, and it had well over 5 quarts, probably close to 6.