How do you change the oil on a Case 90XT?

To change the oil on a Case 90XT, start by warming up the engine slightly to thin the oil for easier drainage. Next, turn off the engine and allow it to cool before placing an oil drain pan under the oil pan and removing the drain plug to let the old oil flow out. Replace the drain plug once all the oil has drained, then remove and replace the oil filter. Finally, refill the engine with the appropriate type and amount of new oil through the oil fill cap and check the oil level with the dipstick.