As much as the automobile has changed since the days of the horseless carriage, one thing has remained the same – they all run on gasoline. But gasoline today is far different from the gasoline that was used decades ago, as Jerry Heasley wrote in his Half-Hour History of gasoline from SIA #70, August 1982. From a nearly worthless byproduct of oil refining to a complex cracked fuel full of additives, gasoline has steadily evolved alongside the automobile.
