The justification for the speed limit was to save fuel during the gasoline shortage.

In 1964, in anticipation of a gasoline shortage, her group began searching for a lightweight yet strong fiber to be used in tires.

These early locations all featured gas pumps on-site; during gasoline shortages in the mid to late 1970s, the firm began to build restaurants without pumps.

However, cheaper oil caused gasoline to prevail, until the 1973 oil crisis resulted in gasoline shortages and awareness on the dangers of oil dependence.