So, I just go my first oil change which was free. While waiting in the customer lounge, I suddenly remember the stories about people possibly having their car filled with 5w-20 oil from when I used to just lurk here in the forums. I quickly googled what oil our STs need and I saw that is was 5.7 quarts or 5w-30 oil. Lo and behold, once the service advisor hands me my paper work, it see that is says they used 5 quarts of 5w-20 oil. I tell the service advisor that I believe the car needs 5w-30 oil. He calmly tells me "We used what the manufacturer recommends. If you want synthetic, it gonna cost around $80. You can pop the hood to check. We used what it says on the filler cap." Ok, so at this point, I realize that my service advisor does not know what type of oil should go into my car and he also does not seem to have a grasp of the concept of oil viscosity. I was questioning the viscosity, not whether it was synthetic or dino oil. I then go to the cashier since I did have to pay for the tire rotation I requested. After that I go straight to my car to pop the hood. Yup, so the oil filler cap does day 5w-30. I go back to him and tell him the cap says 5w-30. He says he will ask the service tech. After a couple minutes he comes back to me and says that the tech did actually use 5w-30 oil. I ask him how much oil did he put in. He replies, "our tech put in the right type of oil and the right amount of oil.". I ask him if he is sure, he says he is. In my mind, the service write-up should have said at least 6 quarts of oil since 5.7 naturally rounds up to 6 quarts. So my concern now is that I hope and pray that they were telling me the truth. If something goes boo-boo with the engine, I have it in black and white that they did use the wrong oil. Seriously, the ST is what, like 5 or 6 years old now? How are tech still getting the paperwork wrong? Well, I so hope it's just the paperwork. Our cars are not supercars or luxury cars by any means, but we bought it with our hard-earned money. It's just annoying that these things happen. @FordService Just venting.