I had my first oil change yesterday. The dealer put regular oil in. When I asked them to show me how the part number on the invoice was the equivalent of the synthetic or semi-synthetic specified in the owner's manual, the service manager was called over and admitted they had put the wrong oil in. The good news is, they immediately replaced it at no cost. The scary part is, they sell numerous ST and other Ecoboost models. How many cars have they put the wrong oil in? I can't believe that they have been missing this, especially since they get to charge more money for synthetic. You'd think they'd be forcing the more expensive oil on customers and using the warranty/manual as leverage to make people pay.