We’ve had some really cold temps (for CHARLESTON) lately, 24-30 Degrees F at altitude. I have quite a bit of my oil cooler blocked off and rather than keep chasing the temps with aluminum tape I’m considering other solutions. At cruise I’m seeing 170-185 degrees for the oil temp and sometimes as low as 130s for coolant temps. A note that is with my cabin heater at full blast. I want to hear everyone’s experience with adding an oil cooler. Also how does this compare to adding adjustable louvers that block the oil cooler? Are both needed?

is a coolant thermostat ever used?