Besides my 03 EXL, I have a 99 Explorer that I just did a coolant flush. I did not have enough Prestone antifreeze to top off the radiator, so I used the Honda 50/50 coolant. I put in less than 1/2 gallon. Any harm in doing this to the Ford?
The 2 gallons of Prestone I did use says it can be mixed with any color coolant.