As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF THE LEFT ENGINE OIL PRESSURE LIGHT ILLUMINATED THEN QUICKLY EXTINGUISHED HOWEVER, THE LEFT ENGINE OIL PRESSURE GAGE BECAME ERRATIC BUT NEVER LEFT THE GREEN ARC. CREW RETURNED TO THE FIELD AS A PRECAUTION AND LANDED WITHOUT FURTHER INCIDENT. FOUND OIL LEVEL LOW, SERVICED 2.5 QTS.