probably a blown head gasket if the oil looks milky or has bubbles in it
Adding 5 quarts of oil to an engine and overfilling it can cause the seals to blow out. This can cause engine failure.
Many things could cause an engine to shake. One, for example, would be low coolant or oil levels.
broken engine gasket.
If it is high enough to be splashed by the crankshaft it would foam up. That would cause a lack of oil pressure and engine damage.
An oil leak is always going to be out of the engine as the engine contains oil and the car does not. I think you are saying you are loosing oil with no apparent leak. If that is the case the engine is burning oil and that is why you see no leaks.
Put the oil fill cap back on!
Lack of proper lubrication, i.e. oil.
THATS usally cause by the engine using oil-because of bad oil rings etc.
Not enough oil in a vehicle will not cause the car to overheat but instead fail due to oil starvation. The engine is have to much friction occur on the internal components which will cause the engine to fail.
Only if you run it out of oil. Otherwise no.
no oil
You oil pump is not working?