Quaker State 10W-30 @ 20:1 with 87 octaine.
Just kidding, Honestly the most important thing is that your jetting is correct for the mixture that you are running. 20:1, 32:1, 50:1 ect. I think people over analize the whole oil thing in two-strokes, four-strokes, planes, trains, automobiles or anything else that uses oil. As long as you are running a quality oil like... Pretty much anything sold in a motorcycle dealership your bike will run fine. You can have the most expensive super duper synthetic racing aircraft grade two stroke oil in your bike but if the jetting is off whats the point? One other thing to keep in mind is regular maintenance if your airfilter has not been cleaned and properly oiled in six months than the best oil in the world is'nt going to do you any good. There was an artical on here a while ago about carburator tuning that was loaded with good info I think everyone should read and
undertand everything in that artical before loosing sleep over what brand of oil to use. There my preaching is done for the day.