As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER ENGINE START, CABIN FILLED WITH SMOKE, #3 ENGINE FOUND TO HAVE OIL IN HP COMPRESSOR SECTION. ENGINE REPLACED. SUBMITTER SUSPECTS COMPANY CAMPAIGN TO CHANGE OIL FROM EXXON 2380 TO CASTROL 5000. OIL IS BEING CHANGED BACK AND #1 AND #9 BEARING SEALS REPLACED.