From your link:
Quote:
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Many motors, especially older engines, are constructed with parts that become very brittle over time and cannot withstand the effects of alcohol. When E10 gas is used, the engine components can disintegrate and clog the engine with sludge and grime, causing the engine to "lock up" and seize. When this happens, often the engine cannot be fixed and must be replaced.
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This is the first claim of engine damage from running ethanol that I have ever heard of. Is this site for real? It looks like they want to sell you something to evaluate your fuel.
There is a simple test for ethanol in gasoline that the SCCA used to use (I don't know if they still do). In a graduated tube, introduce 10cc of your fuel and 10cc of pure ethylene glycol and shake. The ethylene glycol will absorb the ethanol from the fuel, growing the "green" part of the mix and shrinking the fuel. How much gets absorbed is the approximate ethanol content of your fuel.