Several of the cars on this list experience issues with gasoline storage. The Morgan Plus 8 Propane is a much more contemporary example of why this is an issue than the Horsey Horseless, which served as an early illustration. The Morgan Plus 8 came very close to never entering the American auto market. It was initially created abroad but failed to meet more recent pollution regulations. But a San Francisco-based merchant thought of using propane instead. He added a sizable propane tank to the rear bumper, making the vehicle extremely hazardous to operate. Additionally, because the design hadn’t altered much in decades, it was severely out of date.