thats only if the oil seal on the comp. side of the turbo is fooked, and it it was, it wouldnt make it smoke out the exhaust, as the oil wouldnt be getting anywhere near it..it just collects in the ic pipe.. whip your decat off and see if theres any oil there..could also be rings, stem seals, pcv valve etc..try and have a look at the back of ya tub, and do a compression test so you may be able to rule out a few things.