Use the highest rated oil you can find for the best price, it will have a label on the bottle saying if its tcw3 ,jaso fc etc. Heres a breakdown of the different ratings given to 2 stroke oils. Jaso FD/egd passes the hardest tests.
NMMA TC-W3 – two cycle water-cooled, third generation. TC-W3 obsoletes TC-W & TC-WII. Oils with
this spec do not use metal based additives, and are ashless. This is an outboard specific spec.
API TC – only API spec established for two cycle engines. It regulates lubricity, detergency, ash
content & pre-ignition. Oils with this spec are typically using metal based, ash producing additives.
JASO FA – original spec established regulating lubricity, detergency, initial torque, exhaust smoke
and exhaust system blocking.
JASO FB – increased lubricity, detergency, exhaust smoke and exhaust system blocking
requirements over FA.
JASO FC – lubricity and initial torque requirements same as FB, however far higher detergency,
exhaust smoke and exhaust system blocking requirements over FB.
JASO FD - same as FC with far higher detergency requirement.
ISO-L-EGB – same tests and requirements as JASO FB.
ISO-L-EGC – same tests and slightly higher detergency requirements (piston varnish) as JASO FC.
ISO-L-EGD – same tests and requirements as JASO FD.
For what its worth I use shell advance ultra fully syn and its jaso fd rated and reasonably priced for a full syn.