Re: Opti 2 Oil
Although I think Opti 2 is way overhyped on this site (I ran it for awhile, not better than Dominator), I doubt your problem is oil related. That said, what does your plug look like?
Sounds like a fuel delivery issue too.
BTW Amsoil Saber/100:1 oil has been used in various air cooled 2-stroke engines mixed at 100:1 since 1972! So Opti 2 is not even the first to do this. Funny thing is awhile back I ask Amsoil tech what ratio they recommend with Saber for the HT engines. 50:1. But even at 50:1 Saber is pretty darn oily in these engines.