"N20 ENGINE OIL FEED LINE TO THE TURBOCHARGER: LIMITED WARRANTY EXTENSION TO 10 YEARS/120,000 MILES. When starting a cold engine, a ""plume of blue smoke"" can be seen emitting from the exhaust tailpipe for approximately 10-20 seconds. There is no engine malfunction light illuminated (no"" turbocharger boost faults are stored) and no drivability issues are detected. When the vehicle is parked overnight the engine oil pressure will equalize, this may cause engine oil to leak past the turbocharger ""exhaust side"" turbine seal."
