Doug(Floog) and I have the same engine/prop combo and did a test a couple of weeks ago. We started up at the same time temp etc and ran the same startup RPM profile. On a warm up to 120 deg oil temp the difference in time was 30 seconds. I have the oil thermostat and Doug does not. I don't think the thermostat is worth the added weight and complexity. All other flight parameters with regard to oil temp are negligible.

Scott