I read that I can go to auto parts store and use any 10w40 oil for my oil change. But when I search for the sea doo oil it’s 5w40. Why is this? I have to change my oil a few times because I have “milky” oil in the machine due to water in the cylinders. Also, if I’m going to change the oil a few times, Should I also change the filter every time or can I just wait till it’s complete to put a fresh filter in. Can someone please help to clarify this for me. Thanks!