To cool down the oil temperature in your car, you can follow these steps:
1. Turn off the air conditioner as it puts a heavy load on your engine.
2. Turn on the heater to release some excess heat from the engine into the car.
3. Put your car in neutral or park and rev the engine.
4. Pull over and open the hood to allow the engine to cool down.
These actions can help lower the oil temperature and prevent potential overheating issues.