As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISTINCT OIL SMELL IN COCKPIT AND CABIN. FIRST NOTICED DURING DESCENT- IDLE PWR FL230 WE WERE UNABLE TO DETERMINE SOURCE- TOO LITTLE TIME-UPON INSPECTION FOUND #1 & #2 ENG OVERSERVICED. DESERVICED #1 & #2 ENG IAW AMM 79-00-00. PREFORMED FULL PACK BURN FULL HOT FULL COLD IAW AMM 21-00-00. NO ODORS OR CONTAMINATION NOTED A/C O FOR CONT'D SERVICE