Did you guys read your manuals? I was checking out the "break in" suggestions and noticed that it said to not idle the car for more than 5 mins. Why is that? I left it running for about 10 mins to let it warm up while I was getting ready to leave, though i doubt it hurt anything. I was just curious. Also, does anyone know if they ship the cars with synthetic oil in them? I thought it was supposed to be, but not sure. thanks!