An automobile with no or very low oil may seize...kind of like mechanical meltdown. This can happen if people wait until the oil light comes on before they change it...LOL
u will blow your engine oil seals, causing an oil leak and damage to the engine.
The viscosity of the oil may not be heavy enough to protect the engine.
It will slowly destroy the engine.
The engine Burn out
You will cause severe engine wear.
If you put gasoline/petrol in the oil resivoir of any engine, you will destroy the engine if you do not drain the oil and add fresh oil immediately. Start running that engine and it will not last long.
an explosion
I don't think it anything happens but it depends on if it is a different type of oil going on petrol then it will probably.
You freeze up the engine
too much oil in the engine will cause of airation and will create too much pressure to your engine and will damage the headgasket.
You drain the oil immediately. If you run the engine with coolant mixed with the oil you will do serious harm to the engine. If you continue to drive it in this condition you will destroy the engine.
the motor gets lubricated.