As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED THAT THE ENGINE OIL TEMP DROPPED TO ZERO MOMENTARILY, THEN RETURNED TO NORMAL AND BACK TO ZERO MOMENTARILY, THEN BACK TO NORMAL AND REMAINED THERE FOR THE DURATION OF THE FLIGHT. THE PILOT ELECTED TO PERFORM A PRECAUTIONALRY LANDING. THE QUAD GAUGE CIRCUIT BOARD WAS REPLACED AND OPS CHECKED WITH NO FUTHER DISCREPANCIES REPORTED SINCE.