No it is 4 cycle oil, 2 cycles is the only oil you mix with gas for 2 cycle engines. They may be referring to a syn/ conventional oil mix that they have preformed to improve their oil. It will work fine in your 4 cycle engine as long as it is the correct weight for your engine. As long as it is like 10w30 you should be good to go.
It will damage the blower, there won't be enough oil to keep the engine properly lubricated.