In all of the time that I have been going out on boats, I have talked to many different people about their experiences with boat maintenance. It seems that almost every boater has gone through a learning process to decide exactly what kind of maintenance to do on their boat. Everyone has their own time schedule and favorite brand of oil that they think is perfect for their boat.
When it comes to determining what the best outboard motor oil to use is, you have to weigh a lot of different factors. The type of motor that you have on your boat and the age of that motor can really change what type of oil will work best inside of it. This is why one boater might swear by one type of oil while another one would be against using the same type of oil.