https://www.consumeraffairs.com/news...es-engine.html
The (EPA) recently approved the use of E15 gasoline -- a blend of 15 percent ethanol in a gallon of gasoline. While that may be good news for the nation's farmers, AAA warns that could be bad news for your vehicle's engine.
The auto club went public with its concern because of a survey showing 95 percent of consumers have not heard of the new fuel blend. At the same time,
only five percent of cars on U.S. highways have been approved by their manufacturers to use the fuel.
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The problem is that only about 12 million out of the more than 240 million light-duty vehicles on the roads today are approved by manufacturers to use E15 gasoline, based on a survey conducted by AAA of auto manufacturers. AAA automotive engineering experts also have reviewed the available research and believe that
sustained use of E15 in both newer and older vehicles could result in significant problems such as accelerated engine wear and failure, fuel-system damage and false “check engine” lights for any vehicle not approved by its manufacturer to use E15.
Currently almost all gasoline sold at service stations contains 10 percent ethanol. Congress passed the law mandating the additive as a means to stretch the nation's gasoline supplies. But many automobile engines don't run as well on the fuel.
In addition, marine engines have trouble with the fuel blend. Many marinas now sell more expensive gasoline that does not contain the additive.