As stated above, the EC225 glycol was primarily a coolant although no doubt provided some lubrication. It was stored in a tank then released into the MGB when loss of oil was sensed.
One drawback, whilst compliant with the regulations, was that it only gave you 30 mins flying time at Vy, then it was Land Immediately.
The S-61/Sea King idea ported across to the S-92, using an "emergency sump and pump", will likely not be limited to 30 mins. The new MGB doesn't just contain this new arrangement, it also contains gears made from different materials that are more heat tolerant and durable.