
Originally Posted by
Zef_66
I have done it both ways. But if possible, I prefer to have it warm. Having the engine warm will mix all the dirt and stuff through the oil and have it suspended in the oil. Then when you drain it, the contaminants will come out with the oil. If you drain the oil from a cold engine, the contaminants will have settled to the bottom of the oil pan and all the dirt and stuff may not drain out.