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Q: What kind of coolant additive should I use and how often? on 2011 Ford F-250 Super Duty

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I bought this truck pre owned and I sure the coolant is factory
(1) Answer
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(Almost) everything you ever wanted to know about coolant.

http://www.glysantin.de/171-1-G05.html

You coolant should be good for 5 years and the service interval is reccomended at 105K miles. The Motorcraft specialty orange is NOT Dexcool (G34 which is an HOAT hybrid organic acid technology) it is an OAT. Ford has been using G05 for its premium Gold and the specialty orange. If there is any question about the exact spec got with the O.E. fluid.