65C is only 149F, rather cool for
oil. If your temp gauge is accurate, you might consider installing an
oil cooler thermostat. Until your
oil temp reaches a predetermined level, the thermostat keeps the oil circulating back to the engine and not through the oil cooler. After it reaches the set level, it then circulates the oil through the cooler. I have a Canton unit in my car which is set to open to the cooler at 100C. Works great.
