How do you change oil in a royale delta 88?

To change the oil in a 1980s Oldsmobile Delta 88, start by warming up the engine slightly to thin the oil for easier drainage, then turn it off and let it cool. Place a drain pan under the oil pan, remove the oil drain plug, and let the old oil fully drain out. Replace the drain plug, then remove the old oil filter using an oil filter wrench and install a new one, making sure to lubricate the rubber gasket with new oil. Finally, refill the engine with the appropriate type and amount of new oil through the oil filler cap.