Yes.
The oil will expand as the temperature of the engine increases leading to numerous problems from blowing gaskets to aerating the oil which leads to poor lubrication of the main components.
In a nutshell it's can be as bad as underfilling.
Excessive oil use, excessive water use, major oil leak, excessive smoking, ask a certified mechanic
Knocking noise in the engine may be as a result of excessive backlash, misaligned gears and worn timing chain. Blowing of excessive oil pressure could be as a result of stuck regulator.
No - in fact, your engine might just appreciate it!
could be anything. if it's not engine oil, or some kind of engine treatment designed to add to your oil , it's more then likely a form of contamination.
Excessive crank case blow by caused by worn piston rings
too much fuel, excessive oil consumption
No, a defective oil pressure sensor will not harm the engine as long as the oil pressure is what it should be. However, how do you know what the pressure is if the sensor is bad. Replace the sensor so that you can receive a warning if the oil pressure drops below what is optimum.
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.
Oil is required to lubricate all the moving parts, without oil these parts would overheat with excessive friction and seize within minutes, the engine would be ruined.
Low oil pressure due to: Defective oil pressure sensor Excessive engine wear (bearings, weak oil pump)
bad piston rings Excessive engine wear - Rings, Valve guides, Valve seals
Excessive engine wear? bearings Bad oil pump? Oil viscosity too low for age of engine?