Hello, I have been told by Assistant service manager at Kissimmee Toyota, FL that "Toyota engines are made different from any other, therefore Amsoil Synthetic Oil would not work they way they are claiming to be"-? and I am just "wasting money" on it when I can just use regular oil. How is Toyota engine so different that even Amsoil does not take effect-?? or is it simply because Toyota want customer to come to them for business? I am sending this same letter to Amsoil, Toyota, and some other consumer information site. I would greatly appreciate it if you could explain this on going issue of "Toyota vs Amsoil". Thank you.