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      11-15-2019, 04:03 PM   #2
Billfitz
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Drives: '15 328iX GT
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Changing plugs won't create an oil leak. I wouldn't be surprised if the valve cover gasket was bad, it's a common problem past 50k miles, which I assume you are if you needed plugs. It will take some time for the oil that leaked to all burn off.