Every V8 holds at least 5 quarts when changing the oil filter.
Enough to show "Minimum" on the dip stick.
Drain it out and put the correct amount in
If you have too little oil in your car there is a danger that the engine will seize.
No. When you add up the total amount of engine oil, engine coolant, and hydraulic / transmission oil, the tractor has quite a bit more.
Unless you overfill the engine by an extreme amount, you will not notice any difference in how a motor runs which is overfilled a minor amount, as compared to a motor that has a correct amount of oil. The true danger of overfilling an engine occurs when the oil level reaches the point where the crankshaft hits the engine oil and beats air into the oil. This creates foamy engine oil which does a very poor job of lubricating the engine. (think of an egg beater) That's when the engine damage can occur.
Depending on how much oil is put into the car it may just blow a little blue smoke if its a small amount. If its a large amount of oil it will actually damage the engine. Always have the car on level ground when checking oil level, and top up slowly giving it time to drain to the bottom of the engine before using dip stick to check level.
what is a good engine oil to use in my car
I don't know what your definition of a small amount is but, I wouldn't leave it in there for long. Change the engine oil and filter as soon as possible with the correct oil for your car. I have known some old timer mechanics who used to do that to help clear sludge from inside an engine.
Drain the engine oil, change the oil filter and put in the required amount of oil, run engine, shut engine off, then make a mark on the dipstick indicating the full line for future reference.
It will run but not for very long. No oil pump means no oil will be moving throughout the engine to lubricate and cool the engine. The engine will overheat, bearings & rings will wear and in a short amount of time the engine will lock up and self destruct.
This is usually accomplished by either forgetting to refil the crankcase after an oil change, or by running the engine out of oil by not routinely checking the oil level, and adding the appropriate amount when it's running low. It is also possible to seize an engine by overheating it.
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.