A recent industry report claims that cars running on E15, the 15-percent ethanol blend gasoline that was authorized by the U.S. Environmental Protection Agency, have experienced engine damage. Issued by the Coordinating Research Council, Inc., a non-profit corporation supported by the petroleum and automotive equipment industries, the report describes tests on eight popular engines that were run on an E15 blend for 500 hours at loads and speeds intended to simulate the wear that results from 100,000 miles of ordinary driving. Some of the engines were run on ethanol-free fuel (E0), some on E15 and some on E20. The engines were tested with E20, then on E15 if they failed on E20, and then on E0 if they failed on E15.