As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE JFK-NRT, THE NR 4 ENGINE OIL PRESSURE WENT TO ZERO AND OIL QUANTITY PEGGED OFF SCALE. CREW FOLLOWED COCKPIT OPERATING MANUAL, SHUTDOWN NR 4 ENGINE AND DIVERTED TO MSP WITHOUT FURTHER INCIDENTS. MAINTENANCE REPLACED THE ENGINE AND TEST WAS NORMAL.