As long as you change your oil on-time then do not worry about draining the oil cooler, the old oil will stay in there and mix with the new there is no problem with that.S13FX wrote:Oh good idea on the oil verification. The oil pan needs to have a specific amount of oil in it no matter how much oil there is distributed through out the appliances right? So here is my next question when I do my oil change how do I makes sure that all my oil is emptied out of my oil cooler too? Or does that automatically happen when I open my drain plug?