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Old 01-30-2015, 01:55 PM   #4
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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The green antifreeze is fine for Cummins engines as they have cast iron exhaust manifolds unlike Yanmars which are aluminum. It is aluminum manifolds that require Dexcool antifreeze.

I doubt if Dexcool antifreeze let your son make a bunch of $ unless it wasn't changed periodically.

David
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