As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL INFLIGHT T755/20SEP ORD TO SAT - RIGHT ENGINE OIL TEMPERATURE FLUCTUATED DURING CLIMB FROM 110 DEGREES TO 130 DEGREES. AT CRUISE THE TEMPERATURE ROSE TO ABOVE 140 DEGREES. DIVERTED TO STL AND LANDED WITHOUT INCIDENT. REPLACED RIGHT ENGINE OIL TEMPERATURE SENSOR AND RIGHT ENGINE OIL FILTER. SYSTEM GROUND CHECKED NORMAL OPERATION.