Gordon Mackenzie Sr. began the Battery Distributing Co. in the 1930s, operating the business from his home at 41st and Quintara. The business originally sold batteries and battery accessories. Anna Mackenzie handled the book-keeping, while Gordon traveled around the Bay Area selling and delivering products. In the 1950s, Mackenzie secured a contract with Union Oil to be a distributor of their branded products to their Union Oil gas stations. Products sold were batteries, chemicals, accessories and basic tune-up/oil change and auto parts.Gordon Mackenzie, Jr. began working with his father in the Battery Distributing Co.. In the 1950s but in 1960, after Union Oil decided not to renew independent distributor contracts, Gordon, Jr. established the Gordon Mackenzie Warehouse at 34 Page Street. The company sold Accurate Tools and EIS brake parts, and the business operated on the three-step distribution system: Manufacturers sold to a warehouse; the warehouse sold to an auto parts store (jobber); and that auto parts store sold to both the public and the automotive repair facility.