I have a oil temp gauge at the port by the filter - that would make it before the oil cooler. My oil temp runs 190° constant after getting up to operating temperature. Where are you measuring temperature? If it is from the PCM value, that sender is in the HPOP reservoir, which is after the cooler. That would mean the oil is being cooled down to 140 by the cooling system while you are moving. That may mean your thermostat could be stuck open and not keeping your coolant at 180°. I haven't monitored that value - maybe I'll program the ScanGauge to watch that value so I can monitor the delta. To answer your base question, though - 190 isn't too hot - its just right.