In the coolant reservoir when the engine is cool.
All the time
50 / 50 mixture of antifreeze and preferably distilled water usually ( Ford says not to have less than 40 % antifreeze and not more than 60 % antifreeze )
some people have said you should and others have said you dont have to. I myself have never put antifreeze in the during installation in all the years i have worked on cars
As long as the engine didn't overheat you should be O.K.
the antifreeze runs through all your water lines in your car . . . . you put it in your water tank or radiator
Definitely not
antifreeze antifreeze a fifty fifty micture of water and antifrez is best
Depending on the vehicle it should hold a gallon and a half to two gallons, refer to your owners manual for exact amount.
Nothing Nothing
antifreeze keeps your car from overheating, it flows thru your radiator hose, without it your motor would blow
The 2 are not compatible and should be completely drained to include the heater core. Then replace it with the green antifreeze as there is a class action suit against General Motors regarding Dexcool.
YES