And all that should take less than 30 seconds to accomplish once you're informed by the indicators the engine has no oil. Any deviation from that I hope you've had a bit of recent practice of engine off landings, and somewhere ample that is reasonably flat and obstacle free to aim for. There is virtually no room for pilot discretion or undue delay on this one. Some pilots might think about leaving an engine without oil at idle because they don't won't to lose the generator, particularly at night. Utter hogwash. An engine at idle without oil can kaboom itself and its off-sider just as readily as it can when at full noise. Just give it another 20 seconds or so and see. Now if it was an engine chip, pilot discretion might leave it running at idle and bring it up to full noise if you need it for landing. No problem. But an engine without oil you have no other choice, and time is absolutely of the essence.