But E-15 is where the problem lies. I think the Brazilians ran straight ethanol during WWII but this stuff is harsh on the little B&S and my brother in law who used to rebuild locomotive engines at the old Morrison-Knudsen (Motive Power) rail shop and my late father both said it wasn't worth the money to do stuff and we always have to fix it.
Since I live on Social Security disability it's just not worth being a rocket scientist and there are several locations with ethanol free unleaded now.
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I don't know nothing, and I memorized it in school and got this here paper I'm proud of to show it.