I spoke to the Amsoil rep at the St. Paul ice show on Friday.
He said that any of the 2 stroke oils made by Amsoil are ok at 50:1
He said that Saber is made specifically for Augers and can be run at 100:1
I use the outboard injector oil by Amsoil, (which can be used as a premix) at 50:1
The rep said it is fine, as long as it is an oil for 2 strokes, and not an oil that you would use in a 4 stroke engine.
He said that the 4 stroke oil is not made to be mixed with gas, but the 2 stroke oil is.
Hope this helps,
Wiener