The pictures are misleading at best and wrong at the worst. the first upper left picture is eroded valve stems caused by improper air filter maintenance and dirt ingestion. the white deposits on the stems is lead from leaded gasoline, which was discontinued in the 70's, prior to ethanol being added to gas. There is also a picture of an engine that is burning oil, and car engine destroyed by a fire, two or three pictures of gasoline varnish that could of happened prior to ethanol fuel. A water damaged carb, which may or may not of contained ethanol, and some other misc pictures. ethanol could of contributed to some of the problems, and fuel stabilizer may have prevented some of the problems but don't think that it couldn't of happened without the ethanol.