I believe the current thinking is that if you have both an oil sump heater and cylinder head heat that it is better to leave the heat plugged in continuously. At the same time it is recommend to pull the oil dipstick after flight and leave it out between flights. This allows any moisture in the engine to escape up the dipstick tube and reduces the likelihood of moisture re-condensing in the engine.
I had ongoing corrosion issues on the cams of a regularly flown twin engine in a heated hangar until I adopted this practice.
1942 Tiger Moth
2017 Waco YMF-5
Kit # 140694
Received RV-14 Empennage Kit October 22, 2019
Started Tail Cone Dec 2019
2020 Dues Paid