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Bought a 97 F-250 with the 7.3 PSD. The coolant is orange. From what I am reading, there is no possible way this is correct and I need to flush it out and refill with green + SCA.

Is there any correct coolant for this engine that is orange?
 

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Not really. The obs Powerstrokes generally all came with regular green and the sca addative. in like late 1999-2000 Ford started putting the ford gold premium in. stick with the green and the sca in your case though. Cheap and available everywhere.
 

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The only orange coolant that I can think of belongs in Gm's gas engines. The green coolant and adding sca's to it is okay but I prefer Fleetcharge. It already has the correct amount of sca added and easy to get at Napa.
 
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