I don't think that there is anything wrong with the Amsoil Dominator, but I don't really agree with the ratio they recommend. There is just not enough oil in the mix when it's at 50:1.  But there are a few guys here that run it so I hope they will chime in on what ratio they use.

I run Amsoil Interceptor oil at 40:1 without issue so far on my 1992 LT250R thats completely stock.

Have run it at 50:1 for years in my dirtbikes, on everything from a CR125 to my current GasGas EC250.

Oil topics usually run pretty wild in my past experience on other forums, hope this one gets you the info you seek.