I asked Prestone about compatiblity with Ford Premim Gold and this is their response:
Sorry, we forgot about your 2003 Ford E-250. Currently, we do not offer an aftermarket coolant for the WSS M97B51-A1
specification, but we are working on it. If you need to top off this vehicle, a recent Car & Driver article quoted an
industry expert for this coolant as stating that the conventional antifreeze can be added to this fluid. Prestone
Antifreeze in the yellow jug is a conventional antifreeze.
Hmmm does this seem right?
Sorry, we forgot about your 2003 Ford E-250. Currently, we do not offer an aftermarket coolant for the WSS M97B51-A1
specification, but we are working on it. If you need to top off this vehicle, a recent Car & Driver article quoted an
industry expert for this coolant as stating that the conventional antifreeze can be added to this fluid. Prestone
Antifreeze in the yellow jug is a conventional antifreeze.
Hmmm does this seem right?