In terms of oil for your Honda outboard -after break in, I believe you can use about any 10W-30 high detergent oil with an API certification of SG or higher, unless you are operating in extreme conditions. There are probably a 100 or more brands out there, but there are only about five significant manufacturers in North America. So all those brands are often the same oil branded for a specific retailer.
I'm not sure whether Honda has any additional specifications on its oil, butthe Owner's Manual simply states 10W-30 oil with an API certification of SG orhigher.
The key is to change the oil at the recommended 100 hour interval, or everyseason, whichever comes first. If you think about it, if you average 30 MPH onyour engine, then 100 hours is equivalent to 3000 miles. But that 3000 miles isunder rather extreme conditions. It is somewhat equivalent to driving your caror truck, loaded down, up hill, for 3000 miles.
Got this off of Wikianswers some time ago...
Toyota motor oil is made by Mobil. Mobil is using their Mobil Clean formula,not to be confused with Mobil Drive Clean 5000 which is higher priced. Mobilonly packages their Mobil Clean in drums and bulk. Mobil's own literature terms this oil as "a entry level oil."The same Mobil oil is also the Honda factory oil and the GM Goodwrench oil.[/B