How do you change oil on 1999 Isuzu NPR turbo diesel?

To change the oil on a 1999 Isuzu NPR turbo diesel, first ensure the vehicle is on a level surface and the engine is cool. Drain the old oil by removing the drain plug located at the bottom of the oil pan, allowing it to fully empty into a suitable container. Replace the oil filter using an oil filter wrench and apply a bit of new oil to the rubber gasket of the new filter before installing it. Finally, refill the engine with the appropriate type and amount of new oil through the oil filler cap, then check the oil level with the dipstick to ensure it's correct.