Of course you can, you don't have to reach boiling point for moisture to begin to separate itself from another chemical body,
oil in this case. Simply raising the temp of the
oil to a reasonable level AND given enough time (typically 20 to 30 minutes) the water will turn to vapor and begin to separate and purge itself.
BUT, the
oil temp reading is an AVERAGE reading of the sump temperature. All the oil that comes in contact with the combustion chamber area of the heads is WAY hotter than the average sump temp. That "super hot" oil is what carries away the heat and helps cool the engine and stabilize the average sump oil temp.
I could actually cite a couple of places on the net that speak of the ideal working oil temp, but I won't bother. Try the Google, I hear it is excellent served with crow for this evening's dining experience.
