Before I am going to do thermostat replacement as started to sticky a little but I will do flush whole coolant as green coolant. I am wonder do I need diesel coolant additive as ford motorcrafts has one? I has four green motorcrafts coolants to use as flush old green coolant out.

No additives. Standard ethylene glycol antifreeze or Chrysler approved HOAT. Not sure what specs your motor craft is....JR

My cummins has green coolant since I bought it and from 2002 and older cummins are green coolant while Chrysler and cummins had changed from green coolant to HOAT after 2003.

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I did compare the mopar ms7170 and ford motorcrafts green coolant while ford said it is meets or exceed the requirement of Chrysler ms7170.

Motorcrafts green is ethylene glycol-based.

OK then you should be all set :cool:JR

Thank you for quick response.