Marshall, assume NOTHING. Oil temp should ideally run between 180-200F, as that is the temp that moisture and acids/impurities are "burned" off.
If it doesn't get hot enough, it's probably worse than too hot. Wear is greatly increased with not-hot-enough oil.
Once you get the sender working, get yourself an instant-read thermometer, and take readings at various temps via the instant-read touching the oil sender. Then you'll get an indication of what temps the gauge is indicating.