JJB

I just got the engine block heater for the 2006 civic and decided to
install it myself. To install the heater I need to remove the coolant.
I wonder if it'd be a good idea to recycle the coolant into the car,
since the car is very new, instead of having to buy coolant from honda.
I am getting mixed signals regarding this, Honda says that I should add
new Honda antifreeze coolant in a 50/50 mixture, but other people have
told me it shouldn't do me any damage to recycle the coolant. Should I
listen to the corporate machine or to my peers?