The main problem with the fuels with ethanol is that ethanol is very corrosive and many older gas powered equipment cannot handle this fuel well. In the case of the small 2 cycle engines, I have had the fuel lines get gummy from the ethanol, had to replace with line rated for ethanol. In my older cars, had to replace fuel lines, carburetor components, etc. due to ethanol.
IMHO, if the manual says 10% ok then go with regular gas. If you have older equipment you may want to consider the pure gasoline product. I agree with a previous poster about no additives, Stabil, is used for storing gasoline over a long period of time.
Just my thoughts.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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