I lived on the west coast of Australia in the early '70's. I drove a Land Rover station wagon that I had brought overland from England in 1972. One afternoon I changed the oil and filter. Poured in 6 or 7 guarts, cleaned up, closed the hood walked around to start the car and check for leaks and promptly walked through 6 or 7 quarts of oil. Lesson learned: crankcases won't hold oil without the plug in them.

Note; you can reuse the copper washer on the crankcase drain plug if you take it off the plug, hang it on a piece of wire, heat it to a cherry red with a tourch, and then quench it immediately. That will soften to its original state.