One thing not mentioned - you want the car level when draining so you get out as much of the old oil as possible.
I raise the car on one side, set a jackstand (in case the jack were to fail), loosen the drain nut, slide my pan underneath, then lower the car back down level (my drain pan just clears) and loosen the oil fill. After 30 min. (necessary to get all the oil out), I raise the car, replace the drain nut (with new crush washer), loosen and change filter cartridge and 'o' ring. Then drop the car again and refill the oil.
Couple of other points - run the car prior to this until the temp gauge needle just passes 100 degrees - much of the dirt you want to get out will settle, running the car allows the oil to pick this dirt up and hold it until drained, also heating it slightly allows it to drain more quickly and fully without a danger of scalding yourself (be careful of Hot exhaust parts).
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