From a quick google search:
https://www.westmarine.com/WestAdvis...nol-Fuel-Myths
The most likely time for fuel problems occurs when you first begin using ethanol-blended fuel. When E10 is added to a fuel system that has been using non-ethanol gasoline, ethanol, as a new solvent, will tend to dissolve and loosen deposits that are present in the tank and fuel system. Phase separation may occur, resulting in an approximately 50/50 ethanol and water layer at the bottom of the fuel tank.
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Mogas is unleaded, no? I used to work the line at a small airport, drove a 100LL and Jet A truck. Everyone now and then guys wanted to buy 100LL for their tricked out cars and we were told the lead killed catalytic converters.
Further thread drift, we use a lot of acronyms in aviation. I guess they work since I still remember most of them.
Here is one for Avgas:
80/87 is red, 100LL is blue, 100/130 is green, 115/145 is purple
Rich Boys Get Pu**y = Red Blue Green Purple = 80 100 130 145