Lot of good choices on the market, haven't heard of anyone going wrong with the OS #8 plug in that engine. I only burn Power Master 15%, had good luck with there 10% also. Between 10% and 15% you won't see much difference in your LA. I run a lot of different engines, most the time OS and YS four strokes so the 15% just works for me, anything from 1/2A to the 1.40 YS, This way I only have to stock one type of fuel. You may have an LHS that sells another brand. Over time just try the different fuels and see what one you think runs best in your engines.