Quote Originally Posted by JoshMcMadMac View Post
Tossing my 2¢ off to the side, here...

Why do folks think that it takes longer to get warm with a lower rated thermostat? A lower thermostat will open sooner then a higher thermostat, thus circulating the coolant through the heater core sooner and allowing you to get heat quicker.
The t-stat has no effect on coolant cycling through the heater core. It will cycle coolant through the heater core with the t-stat closed.