[SharkPilot]

I read in the Helm manual that there is a constant minimal flow of oil allowed through the cooler at all tempuratures. The reason given was to prevent a slug of cold oil going into the engine when/if the oil thermostat opens.
Based upon that I would think that the oil cooler always has fresh engine oil inside.
One thing that I have noticed on my car is that even after a slow drive home from work the oil cooler pipes are hot. So there has to be something flowing through there even at lower operating temps.

SharkPilot