The chocolate milk colored oil indicates significant water is emulsified in the oil. If it's been sitting for 3 years the rings and valve seats are rusted to some degree on an already tired engine. And no telling how long your aunt drove it with water in the oil. Sounds like it's not the oil cooler as you describe, which I was hoping you might get out of this cheap. I don't believe that'll be the case. I'm gonna bet on a cracked head or block. Do you live up north where it gets really really cold?
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Chris Dennis, Plano, Texas
'07 Boxster, arctic silver, Tiptronic, 106k miles, no mods
‘13 Boxster S, black on black, PDK, 27k miles, garage queen
‘66 Mooney M20E, hangar queen
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