Normally, in my chain saw and weed wacker I just use the same outboard oil I use in my boat. Seeing as both of those peices of equipment are cheap, and well used, I think I want to start using something better. Both call for 40:1. What would be THE best oil to use? I'm thinking Amsoil 100:1 @ 50:1. (I don't care what the bottle says, I will never mix any leaner than 50:1) Is there anything better out there? Amsoil wouldn't be any different than any other oil at 50:1 would it? (in terms of smoke and carbon buildup) Also I think I'm going to start using fuel power in this equipment...