When I was looking for new outboard motors for my boat, I was especially focused on finding one that I would be able to use that would run a lot more cleanly. Since I love being out on the water, I wanted to make sure that I was doing my share to keep the environment nice. I figured this meant not pumping lots of nasty smoke into the air.
I looked at a couple of different motors that my friends recommended based on efficiency and cleanliness. I was able to find a great Optimax outboard that would run a lot cleaner than many similar outboards. As long as I use Mercury Optimax oil in my engine I am able to keep the motor running cleanly and efficiently each time that I take it out.