I just put in synth. and my oil temp is about 212.5 ave. Sometimes 225, but never over that. I didn't pay attention to my oil temp with the dino oil but I suspect the synth will run at a cooler temp.

Tommy
99.5 1.8TS-Tip

99.5 1.8TS-Tip

I changed to Mobil 1 at 5K service. Normal running temperatures dropped about 12.5 degrees.