e58 police oil cooler

An oil cooler is good for mixed use but I think I would want an active thermostat and bypass. The thermostat opens when the oil gets above desired temp and sends it to the cooler but not before. Otherwise your oil is going to be cooler than ideal running through the cooler all the time. Sort of like removing the coolant thermostat. As I read it that kit has a check valve, which should only prevent reverse flow. Something to consider. If it is always hotter than desirable then the full time cooler would be the way to go.