Oil change

[Grub54891]

Simply change the filter only, once a season. Add a quart for the filter, in 5 years you have completed an oil change.:facepalm:

 

[jimmbo]

It's your engine, and of course you can do what you want with it. If you only plan to keep the boat for a couple of years, and the hours are low, why waste money changing the oil. If you plan to keep it a long time, then oils changes are almost an investment in the engines longevity.