Your coolant is what controls the engine temperature. There is an oil cooler to directly exchange heat between the coolant and oil systems - if you are running higher coolant temps due to the Evans you will run higher oil temps.No,
1. The coolant temperature can differ from the oil temperature.
2. Coolant only begins to vaporize at around 130C - 140C because it is under pressure and becomes critical at an oil temperature of 120C.
3. I drive a special coolant without water that only boils at 180C.