 The Economy Run originated with the Gilmore Oil Company of California in 1936 (which was purchased by Socony-Vacuum in 1940) and later became the Mobilgas Economy Run, and still later the Mobil Economy Run.The cars driven in the economy run were fueled with Mobil gasoline, and Mobiloil and lubricants were also used.The vehicles in each class that achieved the highest fuel economy numbers were awarded the coveted title as the Mobilgas Economy Run winner.