Does 10% ethanol gasoline damage a car's engine?

Can ethanol really do damage to an engine? Yes. Here's how. By Mike Allen. Dec 21, 2010. e15 in a beaker. Most people realize that all of us burn gasohol—a mixture of gasoline and alcohol—in our cars. Just about every gallon of gas pumped today contains as much as 10 percent domestically produced ethanol. read more

At this concentration Ethanol is basically harmless. In Brazil, all gasoline is actually E27, and we don’t ever see people complaining about broken engines because of ethanol. Ethanol at 10% is safe for your engine on the long run. I have a 1988 car running on E100 since it was manufactured an the engine is running ok. read more

In short, ethanol increases the chances that your car will be damaged trying to process and burn contaminated gasoline. Let's assume that most of the time the fuel's environmental conditions aren't seriously compromised, its ethanol stays in suspension, and the gasoline is properly reaching its destination. read more

Automakers have filed a lawsuit against the EPA's decision to make E15 (gasoline with 15 percent alcohol) legal for all cars after 2007. They argue that, among other problems, the blend could damage the engine. Wait, moonshiners used to run their cars on 190-proof hooch. read more