As I stated earlier the cooling system must be much more efficient or oversized compared to stock to use a less efficient heat transfer medium (Evans) than the water based liquid it was designed for. If it’s not transferring the heat into the air as effectively as water based coolant you can be sure it’s not absorbing the heat as effectively inside the water jackets inside the engine and those temperatures are higher than with a more efficient heat transfer medium.
Something else to think about when changing to electrical fans, all of our older cars weren’t designed like the cars produced in the last dozen or so years with air dams and such to create negative pressure behind the radiator or direct airflow through the radiator. The mechanical fan was there and created the negative pressure or the pulling effect to cause the airflow through the radiator while moving down the road especially at lower speeds.
With these two changes you have greatly reduced the efficiency of the cooling system.
