In my case, all oil changes are synthetic and free during warranty period. But even still, I’d rather do it myself now, just in case. Don’t want to risk burning something up because some dimwit didn’t tighten my oil plug enough. Not to mention, it only took one time of some moron spilling extra oil down the side of my block, or not wiping up what fell out when the filter was removed, and that was it… all on my own, now.