Don't fill boats with E15 fuel from gas stations, Coast Guard warns

The fuel, which contains 15% ethanol, was authorized for the summer for use in cars. However, it's federally prohibited for vessel use because of its potential to cause marine engine damage, thus voiding any engine warranties, the U.S. Coast Guard says.

Even more worrying, the Coast Guard says E15 fuel has been proven to make engines run hotter, which increases the likelihood of a boat fire.

To keep boaters safe, the Coast Guard recommends filling water crafts with gas containing no more than 10% ethanol.