Ethanol is alcohol, alcohol attracts moisture, moisture attracts corrosion and corrosion put money in my pocket. I can't make it much simpler. If you are turning your fuel over in thirty days or less, there is very little chance that you will notice a difference. If you are a landscaper or drive a vehicle you will probably never notice a difference, because you never have fuel sitting around. The average homeowner likes to have a 2-5 gallon can sitting in the shed and here is where the problem occurs. As I have said before, we advice all customers to use non-ethanol fuel in all their small engine units. Yes, it does cost more (about .45 in my area) but at today's labor rate, we call it cheap insurance. Just like our customers, each of you must decide which route to go. Can I prove that this way is better, no. All I can say is that we have seen a drastic drop in the number of fuel related problems by customers who have changed and if I had a dollar for every customer who has said thank you because he has noticed a difference, I could take a nice vacation. Still clean and rebuild about a dozen carbs a week, so we still need to educate our new customers. Do what works for you.