Ok --

Here is an embarrassing question to even ask, but how do you guys recommend using the oil cooler door?

My plane is a IVP.  The little knob on the panel, pushed in, leaves the little flap in front of the oil cooler open.   This would, I assume, cool off engine oil at the expense of running cooling air around the #2 jug.   You pull the knob out and it closes the oil cooler door, sending more air around the #2 jug at the expense of cooling off the engine oil.

So on a practical day to day basis — how do you guys use/operate/manage that oil cooler door?

Thank you,

John Hafen
IVP N413AJ 110 hours.