how cold is too cold for oil temps?

atropine

Thanks guys. I will look at making a cover for the cooler tomorrow. Looking at that diagram, it looks like the oil temp sensor does sit just inside the block from the oil filter, above the oil pan. If the oil level does not sit up that high above the pan, I guess I could see how Dustin @ Z1 would say that the returning oil temp is different than the oil lying down in the pan. I just don't know what the natural resting oil level is in the pan.