I just had my oil changed at my somewhat local dealer. Thankfully I knew what the container for the 505.01 oil was supposed to look like. The particular dealer has a huge window so you can watch them working on you car. I saw him pouring in oil out of a black container. When my paperwork came up, I asked how I can tell what oil was put in my car. The service advisor brought out the silver container of oil that said 505.01 on it. I told him that's not what I watched the mechanic put in my car. Well....he disappeared for a few minutes then got the manager. I was correct. They put regular synthetic instead of the 505.01. So they drained that oil and replaced with the 505.01. I have it in writing that they goofed up and put the wrong oil in my car should something happen. My question is this: how likely is it that this will screw up my car??? I'm very concerned!