Ethanol is in there to support to the corn growers and fund the kick backs to the politicians who ‘throw their weight behind’ this very stupid and short sighted notion that it magically reduces pollution. Ethanol pulls in water, degrades fuel lines and rubber carb components, increases engine heat production all leading to additional wear and tear. And is a potential disaster to light sport engines. Lead in avgas does lead to additional deposits, but also reduces valve wear. Side note: all of this is moot as long as aviation insurance continues to soar and exclude those who want to buy or build.
