Where I live gas is at $2.50 at 10% Ethanol at 87 octane and $2.90 for non-ethanol at 89 octane per gallon. I understand that smaller engines do not do well on ethanol. Is the loss of efficiency from containing ethanol worth the saving? Is the cost difference between the 2 either way worth the mileage and maintenance? Does smaller the engine equal less efficiency on ethanol?
small engines don't need the extra octane and the extra octane won't produce any higher efficiency. However, non-ethanol gas doesn't attract water link ethanol gas, so it doesn't corrode the inside of the carb. That's why it's preferred. But you still need to add fuel stabilizer if you're going to keep it in the tank more than a month.