It depends on how much over. A little won't hurt. Too much it will foam and not lubricate. Meaning your engine will wear out much faster than it should.
You have difficulty concentrating on anything for extended periods of time.
Yes, if you are wanting to clean the inside of the engine.
perhaps you mean brake fluid. The engine oil will be spoilt, as will be the Brake Fluid.Read more: What_is_the_treatment_for_engine_fill_with_break_fluid_and_engine_oil_mix
over $23,000 You can realistically add at least another '0' to that ! - I doubt very much you could even buy the Merlin engine for $23,000.
It can. You should leave the engine running while you add water to the radiator. If you add water with the engine turned off, but while the engine is overheated, you might damage the engine or the radiator.
add it to the oil.
The liquid may boil and become a gas.
You could but the check engine light will always be on.
If I could remember of, you could only boost at -+5psi (0.3-0.4BAR) on stock ECU. Above that, the ecu will give you some kinda hesitation/fuel cut. Unless you would run a piggyback or air flow converter.
4 over 7
It could seriously damage the pipes and tubes inside your engine. This will result in your car failing to start and you will have to go to a garage to get the gas emptied out of your car.
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.