Hasbeen,
I actually prefer the 100:1 stuff for most premix applications, including water cooled outboard motors. The 100:1 is a JASO/FC and ISO EGD formulation and burns very clean at lean ratios of 80:1-100:1 ...
As I've mentioned several times, one reason why you can safely run these ratios is that the Amsoil 100:1 oil contains no solvent - it's a blend of several types of pure synthetic esters. Most 50:1 mix, petroleum two stroke oils are heavily cut with stoddard solvent so that they will mix well with gas and flow at low temps in snowmobile injection systems.
For outboards that use oil injection, this new Intercepter oil is probably the way to go ....
Ted K.
Dixie Synthetics