My 2000 Powerstroke came with green coolant and after having a new waterpump put in the service dept put in gold coolant.I know there is no maintance on the gold coolant.I have two questions about the green and gold coolant.(1)After you drain and fill to capacity the green coolant what is the process of adding more green to the system?Do you add equal parts of green and distilled water or just coolant?The same question applies to the gold coolant.Any help would be great.Thanks Joe