That's a good question. I'm not sure. However it doesn't stand to reason that engine oil temperature would be below 200°F (especially on a turbocharged engine) if coolant temperatures are well above boiling (212°F) and under pressure to prevent vaporization. Engine oil temperatures should be much higher. I assumed that the temperature there was transmission oil temperature for that reason, plus the fact that the 200°F temperature on the LCD takes about 5-6 miles to reach stabilization while engine coolant temperature on the other gauge is at operating temperature much more quickly. With engine coolant monitored, it stands to reason that engine oil temperatures would be less important to monitor than transmission oil temperatures.
I'll see if I can find out for certain.