Since I own a boat rental company, I vary what type of oil I use in my motors based partially on what they can take and partially on what I can afford. This means that I am not always able to use premium brands of oil because these brands are expensive. I buy all of my oil in bulk and try to make sure that I can get the best type possible for my motor.
While I can’t always provide my boats with the best oil that money can buy, I do what I can to make sure that the motors stay clean and are running great. I use different additives including ringfree plus to make it so that I am able to keep my boat running the right way. With this kind of maintenance I find that my boats continue to run excellently.