On my other motors, I always used 32:1 full synthetic Amsoil Dominator 2 cycle oil after breakin was over...breakin was 25:1. Valvoline conventional multipurpose 2 cycle oil.
On the new Phantom, Its still in breakin mode and I am running 20:1 Valvoline conventional 2 cycle multipurpose oil...Not so much as one drop of oil has come out of my exhaust pipe either as well as no perceivable smoke.