The reason of why I'm concern about this, is becuase all my friends use regular oil on their engines type r, turbos, all motor E.T.C. They keep on telling that the reason of why synthetic oil gets everywhere in your motor is becuase is 2 thin. The other thing that they told me is that once you been using synthetic oil for a while, your car starts smoking. I just start seeing some smoke on my civic, so I dont know if they are right and is due to the oil or if it is something else. Can some one please help me.