What was found
AIRCRAFT WAS NOT GNDED. ON TAKEOFF OILY SMELL IN COCKPIT & MILDLY IN CABIN. CLIMBING, ODOR DISSIPATED AT 8000 FT. ON APPROACH ODOR REOCCURRED THROUGH LANDING, THEN DISSIPATED ON TAXI IN. PERFORMED JC 26LOOO21001, FOUND APU TO BE OVER SERVICED. CORRECTED APU OIL LEVEL. OPERATIONAL CHECKED GOOD, NO ODOR DETECTED. OK FOR SERVICE.