The opening point of the thermostat depends on the manufacturer. The Stewart Components thermostat is fully open by it’s rated temperature. That’s why I keep saying there is a difference in thermostats. If you have a 180 degree thermostat and it’s not fully open until 200 degrees it’s junk. That means the rated number doesn’t set the minimum operating temperature. It’s basically a guesstimate. 1. I agree, but I will say this. The oil temp isn’t much lower if the coolant is 180 than it is if it’s 200 degrees. IMO, short drives is what keeps the moisture from being cleaned up. 2. I also agree, with a caveat. Any time the intake manifold is heated with exhaust gas, coolant temperature means very little in vaporizing the fuel. The exhaust gasses are much higher in temperature than the coolant ever will be.