Thread: Marvel Mystery Oil
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Old 07-07-2022, 10:08 PM   #1
Nick in Fayetteville
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Join Date: May 2010
Location: Fayetteville, NC
Posts: 341
Default Marvel Mystery Oil
Is anyone adding Marvel Mystery Oil to the coolant in their radiator? If so, how much? I have heard that it keeps rust down and lubricates the water pump.
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