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Broken or improperly installed rings?
Holed piston?
Improper or worn valve guides?
Overfilled oil tank with ring blow-by pushing oil into the intake?
As above, check your spark-plugs for oil fouling. If they are clean, this should just be residual oil in your exhaust. If not, you will need to do a comprehensive diagnostic evaluation of your engine.
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Steve
Sapere aude
1983 3.4L 911SC turbo. Sold
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