 At the end of the month, Hartz drove the same car from Los Angeles to New York City and set an economy record of , and without having to add water at any time during all of these performance runs.Another source credits him with driving the newly introduced DeSoto Airflow from New York to San Francisco, and averaging , with a total fuel bill of US$33.06 for the run.He also appeared at the 1933 Chicago World's Fair as a stunt driver at the Chrysler Exhibit.