well I have changed the oil after about 30 passes and it is still thick and does not smell like gas...so I will leave it fot now until I start cruising.....but back on current subject....any exhaust leak pre turbo...will effect NB sensor...not only does exhaust get blown out but fresh air gets sucked in....thats why you here a tick..tick..tick.. it is pulsating...and not just a constant ssssssh sound....