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-Yes and no. Internal combustion engines can be designed or adapted to run on almost any kind of fuel and there have been a number of engines run exclusively on alcohol.

-Note: there are two kinds of alcohol. Methanol, or grain alcohol, is commonly thought of as drinking alcohol. Ethanol is wood alcohol and is EXTREMELY toxic to humans. Either will power an engine; if you want to run your Lamborghini on Martel 5 Star be my guest...

-Alcohol and gasoline have different detonation points so they aren't directly interchangeable. You may see "alcohol injection" systems for WW2 fighter aircraft and racing engines. Alcohol actually reduces the temperature of combustion and is used on a TEMPORARY basis to increase engine power.

-In winter many people put "gas line antifreeze" when they fuel up. The alcohol in the antifreeze bonds with water in the tank and allows the water/alcohol mixture to pass through the fuel filter and be burned in the engine. Left untreated water buildup would clog the fuel filter and shut down the engine.

-The main problem with Ethanol/Gasoline mixtures, however, isn't with the engine itself but with fuel lines and gaskets. Certain types of "rubber" hose and "plastic" gaskets react poorly to alcohol and will start to dissolve causing all kinds of interesting problems. When alcohol additives were first used manufacturers would not repair damaged engines still under warranty because they weren't designed to work with alcohol. That has changed but check your owner's manual to see what percentage of ethanol your warranty covers.

-In general adding ethanol to gasoline may not be a great thing but it isn't a bad thing as long as your hoses and gaskets are up to it.

-And, unlike gasoline, you can brew alcohol in your back yard.

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Q: Does ethanol cause any damage in a gasoline engine?
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