MPH 168, your tests while interesting, are not the entire answer. Go look at what an OEM does to their fuel systems to handle ETHANOL concentrations above 10%. This typically means special fuel lines, stainless steel fuel rails, special injectors and so forth. Do you think they do this just for fun? Yes, some of the challenge is due to water because ethanol absorbs it. Do you really believe there is no water in the fuel distribution network and underground tanks? There is no water in the atmosphere that fills your fuel tank as the fuel is consumed? The OEMs make these decisions based on data and what is required for the products to live in the field. I speak from direct experience, not conjecture. Even at 10%, ethanol is often a problem for many engines. If you use the fuel quickly, it's not as great an issue. For small engines, boats, and cars that may sit for months without consuming a tank of fuel - it is a problem. It can be reduced somewhat by keeping the tanks full to remove air space and by using high grade fuel stabilizer with anti corrosion additives. E15 doesn't make life better for them. My small engines ate fuel lines with regularity with E10. Since I moved to E0 Rec fuel, no problem. If you like ethanol fuel - use it, but recognize the compromises and don't force it on those who don't want it.
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