Re: 100:1 Mix
Opti-2 makes the claim that their oil is different due to it's "eutectic" properties, which they describe as improving the surface metal of the cylinder wall instead of just lubricating. They have some info on their website showing it actually smooths the metal surfaces, thereby further reducing friction.
To me, it sounds awefully snake-oily, but I have been using it with great results so far. Engine runs great, NO smoke and NO oily splatter on wheels and frame.