I have driven my Superformance in all weather and unless I am working the gears my
oil temp is always low. Normal driving and I will never see my
oil temp rise above 60 to 70 C(140 to 160). I just finished (tonight) installing a
oil thermostat. I ran the engine and in no time at all I was up to a normal oil temp 80 to 90C (175 to 195) and this was in the driveway. In cooler weather I have seen my oil temp as low as 130 and that was going down the freeway on a cool morning. I would watch the oil temp and if it stays cool then go with the Thermostat cold oil is not good. Now this information only pertains to my itty bitty small block.