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Motorcraft Premium Gold Engine Coolant (yellow-colored) mixed at 50/50. First change interval is 5 years/100,000 miles and every 3 years/50,000 after that.
If your interested in upgrading to a better coolant, you may consider looking into Evans NPG+ it is a waterless coolant and can be run with zero or very low pressure, therfor prolonging the rest of your cooling system.