iAlso modern 2 cycle equipment needs his high octane gas because of the temperature they run at. A good synthetic oil to mix with the gas is cheap insurance too. The Stihl synthetic is one of the best.
I use ethynol free premium gas in 2 cycles and stihl i use their oil,my big husqvarnia i use their oil.the bar n chain oil is diffrent weights for each as well as fuel oil