180-200 on the gauge is 220-250 in the cylinders.
Oil temp is 40-50 deg F higher in the cylinder than the sump.
(per Ben Vissar, Shell Oil Research, retired)

BT wrote:

The oil needs to be heated to the point to "boil" water contaminates out of
the oil.
Normal oil temps to 180F-200F is not the 212F of boiling water, but it is
enough to keep the oil out.