This topic generaly surfaces at this time of year. I have never had what I felt was sufficient
oil temprature. I run a cooler (Humm?) and because of that and even though I run a piece of clear lexan covering it, the
oil temps generally are about 160-180, with water temps at 180, this being in the summer. I am sure some minor amount of heat is being disipated through the cooler lines and I have considered wrapping them in some sort of insulation but more importantly I have researched the available
oil thermostats and bypass valves and have come up with 3 in line thermostats and 2 manual valves; Mocal, Canton, and Hardine Marine. Are ther others? Is anyone using one of the manual valves?