hello all I will soon to be running a oil cooler kit with a built in thermostat etc the normal amount for these engines is about 4-4.5 liters I think ???? should I add a bit more due to the fact if the oil is cooler then the stat what ever is left in the cooler is basicily in the cooler pipes ???? then would effect the oil level etc I just don't want to spin a shell etc with losing oil