As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ADDED 5 QUARTS OIL TO NR 2 ENGINE IN LAS, TOTAL 13 QUARTS. HALF WAY TO SAN, QUANTITY WAS DOWN TO 4 QUARTS. (KEPT SLOWLY DECREASING IN-FLIGHT). SHUT DOWN NR 2 ENGINE. TEMPERATURE NEVER EXCEEDED 110 DEGREES EVEN AFTER IDLING AND SHUT DOWN. DETERMINED OIL FILTER HOUSING GASKET BLOWN. REPLACED WITH MS93H-236 O-RING IAW 79-20-00 DC-9-IPC. (X)