Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2004 Saturn ion cold start engine knock › 2004 Saturn ion cold start engine knock April 26, 2012 at 11:00 am #439234 ionukieParticipant Quoted From college man: are you using the cars recommended oil weight and viscosity?C8-) Yes of course! I always make sure to use the right oil for my car.