M_Boats: 2-Cycle Oil Recommendation

Friends, What is considered the best/better 2-Cycle oil to use with pre-mix marine outboards? I have a Yamaha 4 hp that uses a 100:1 mix. I saw a couple of posts mentioning a biodegradeable 2-cycle oil. In searching the web I found Amsoil offers one. Are there others? Also, Thank You! to everyone who replied to my question regarding removing stubborn stains in the non-skid. I started with some toilet bowl clearner we had here at the house. It made serious progress in removing the stains. And I am happy to say it did not appear to harm the fiberglass. Next I am going to try the Softscrub with bleach, especially on the smooth surfaces. Our M-15 has never looked better! Again Thanks, Randy Graves M-15 #407 Post Falls, ID