How much oil is "missing"?
The noise
engine
your car is broken
cold engine
The crank noise in your car could be caused by issues with the engine, such as worn bearings or a faulty crankshaft. To fix it, you should have a mechanic inspect and repair the engine components causing the noise.
possibly a broken or missing engine mount
There are a number of causes for a rattling noise that occurs in a car. These include low oil and an engine that is faulty or going out.
because the engine is still processing the oil for about 20 seconds after you turn the car off
When you can not figure out why your car makes a strange noise, you take it to a mechanic.
A muffler is a part of a car that silences the noise of a vehicle's engine.
zero engine noise
Muffler