So it occurred to me that the car didn't have a tick of any kind until I changed the oil. My rental which was a 2013 focus mines a 2014 didn't have this noise either. I don't think it's injectors it sounds like valve train noise. I realize the oil causing the noise isn't a harm it's just how some oils are. However has anyone experienced this with syntec? And would you change it early because of the annoyance or leave it?