As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ODOR OIL SMELL - DISTINCT OIL SMELL IN CABIN AND COCKPIT. STRONGER IN LAV AREA AND CABIN, LESS STRONG ON COCKPIT. NOTICEABLE ON GROUND WITH APU AIR ON AND IN-FLIGHT WITH APU AIR OFF. CLEANED THE WATER SEPARATOR REMOVED AND REPLACED WATER SEPARATOR CONDENSER BAG. POWERED UP THE AIRCRAFT AND PURGED THE AIR DUCT OF ANY RESIDUEL SMELL BY BLOWING HOT AND COLD AIR. OPS CHECK GOOD AND NO SMELL AT THE TIME.