All cars built after 1988/89 are designed to cope with ethanol since the stuff has been routinely added to regular fuel ever since (even if the petrol pump doesn't tell you, there is usually at least 5% ethanol in all fuel)
The "it's corrosive, it'll destroy your engine" myth has been around for many years and it stems from a confusion between Methanol and Ethanol - both "alcohol" but both very different (don't drink methanol - it's worse than corrosive). There have been attempts to run cars on methanol, the car runs well but, like you said, it's corrosive and the inside of the engine, especially the head, doesn't like it. That's why ethanol is better.
Most cars in Brazil have been running on 100% ethanol since sometime in the 80s, it's an interesting history.
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