What exactly are we calling low oil temperature on the gauge? I see threads on the 930 forum that running mid gauge is "too hot" and will cause damage. Mine runs at the first tick mark, and I too have a large front cooler... First tick mark is about 194 degrees I believe...
Also, measuring the outside temp is not the same as the actual oil temp...
See pics in this thread...
https://forums.pelicanparts.com/porsche-911-technical-forum/402203-my-oil-temperature-too-hot.html