My 225HO has 56 hours on it. I know they say you do not have to replace the lower unit oil until 300 hours but I think that this is cheap insurance to change once a year. Went to a dealer and the head parts man was not there. I ended up with 2-32oz. containers of HPF XR ( synthetic Blend). Is this what the book says to use and do they still say it takes 33 oz and sell it in 32Oz. Good trick ?