recheck plenum for new oil pooling. Also check your turbo intakes for new oil. Check your PCV valves, and if you've replaced the PCV hoses, make sure they have the restrictors in place. I've had this issue myself due to a oil flooded engine (5.1 quarts), and it took a solid day of driving for the smoking to go away after draining the oil and cleaning the plenum. Oil had pooled inside the turbos so much so that I could see it leaking down the inside of the downpipes. I recall reading it took another poster 3 days of driving for the smoke to clear up.
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