As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100 HOUR INSPECTION, COMPRESSION CHECK REVEALED ALL SIX CYLINDERS LOW AS FOLLOWS: 35/57/50/51/49/51. CUSTOMER REPORTED USING 1 QUART PER HOUR PRIOR TO INSPECTION. REGULAR SOAP AT 50-HOUR OIL CHANGE REVEALED NO MAJOR PROBLEMS. TOTAL TIME 793.8 HOURS SINCE TCM. ZERO TIME REBUILD. SUBMITTER SUSPECTS OVERLEANING.