CentaurG2
Addicted to ArboristSite
I run both amsoil sabre and stihl ultra at 50:1 10% etoh and have noticed no difference in saws performance between the two brands. Amsoil is available at my local NAPA store but it only comes in quart bottles so it is less convenient to use than the stihl brand. The Amsoil does give the mix a good deep blue color as compared to the much lighter ultra.