>(f) Every retailer and wholesale purchaser-consumer shall equip all gasoline pumps from which gasoline is dispensed into motor vehicles with a nozzle spout that meets all the following specifications:
>(1) The outside diameter of the terminal end shall not be greater than 0.840 inches (2.134 centimeters).
>(2) The terminal end shall have a straight section of at least 2.5 inches (6.34 centimeters).
>(3) The retaining spring shall terminate at least 3.0 inches (7.6 centimeters) from the terminal end.
If these regulations weren't present, Ford could have it's own gas stations and gasoline that were incompatible with GM's and so on.
>https://www.law.cornell.edu/cfr/text/40/80.22
>(f) Every retailer and wholesale purchaser-consumer shall equip all gasoline pumps from which gasoline is dispensed into motor vehicles with a nozzle spout that meets all the following specifications:
>(1) The outside diameter of the terminal end shall not be greater than 0.840 inches (2.134 centimeters).
>(2) The terminal end shall have a straight section of at least 2.5 inches (6.34 centimeters).
>(3) The retaining spring shall terminate at least 3.0 inches (7.6 centimeters) from the terminal end.
If these regulations weren't present, Ford could have it's own gas stations and gasoline that were incompatible with GM's and so on.