smoke upon start up

[Vincenzo Basile]

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Hi list
thank you for input on smoke upon start up.Yes I have changed the oil about=
 5 days before it started smokingand i used an aditive for the oil.A lister=
 also said it might have been the turbobearing seal.Well it stopped smoking=
,but I havent driven too hard.My question is How do I determine if the turb=
o bearing seal is bad?
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