Bill Kinney <greatketch@...>
Hello from the other side of the anchorage :)
Harmonie came to us complete with a jug of oil that was labeled with the CatPump brand, as "high pressure pump oil." Since that is now gone, I have been using regular SAE40 oil. The logic is that the engine room on a SM is a pretty hot environment, so the slightly flatter viscosity curve of 30W40 really isn't needed. I don't think this is a particularly severe or difficult lubrication application.
I have a scheduled change interval of once a year on that oil. Puts me well under the manufacturer's hourly recommendation, and makes it easy to schedule.