As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, THE PILOT NOTED THE RT OIL PRESSURE TO BE ABOVE RED LINE. ACFT LANDED WITHOUT INCIDENT AND INSPECTED. IT WAS DISCOVERED THE OIL PRESSURE GAUGE WAS READING 10 PSI HIGH. NEW GAUGE HAD BEEN INSTALLED 1 YEAR EARLIER FOR UNRELATED REASON.