Personal observation: I cannot believe people are being sold on paying $5 and up for a quart of ethanol free premix! I just did this when purchasing a new leaf blower to get a 4 year warranty. I have never to this point had a problem that I can blame of the E-10 gas! For years I have been using a fuel stabilizer and Marvel Mystery Oil in my air cooled engine gas. I have never seen any pitting or corrosion in the fuel system. Today I was as much as told that the E-10 fuel was responsible for clogging the spark arrester in my new chain saw with less than 2 gallon of fuel ran through it and I used the recommended premium oil and grade of fuel recommended by the factory. The technician recommended I buy the ethanol free premix - I don't think so. Some insist on running premium fuel in air cooled engines. I just do not buy it! It seems like a lot of extra expense for no good reason. Personally I think we are being sold something we do not need! You are paying $20 and up per gallon of fuel.