Photograph of file box, Southern California, 1930. "Instructions, The Pennzoil Organizer; Record Cards - Form 122, Fill out card completely for every new customer on crankcase or greasing work. Take from Auto Registration card. Explain to customer this 'free reminder service'. Insist complete records.; Files, File cards alphabetically according to name of customer. Example: Allen, Ernest R., [ilg] 'A.' in front of Allen, Robert C., (As list grows, use 1-31, index in conjunction with A-Z index. Make duplicate Record card [ilg[ach customer and file under date when reminder cards are to be sent out, thus establishing [ilg] index.); Reminder Cards, Referring to your record cards, mail reminder cards every morning to those customers who [ilg[ not been in for service during past month. Be certain to record date this card is mailed. Customer does not come in for service in two weeks, mail 'Second Warning Card.'; Results, This system has been thoroughly tested and has proven highly profitable and very [ilg[ive to those dealers who conscientiously keep their records accurate and up to date. [ilg]lf way attempt at using this system will do more harm than good, as customers lose [ilg]ence in the idea, which reflects on you. Some of the results you may expect are as follows: 1. Increased and more profitable business, 2. Steady, repeat business., 3. Complete and efficient records of all lubrication work you do., 4. A reputation as a progressive and aggressive dealer, handling quality products, 5. Good will from customers you remind.; Guaranteed by the Company, [ilg] Oil of Supreme Quality; The highest grade oil in the World" -- on instructions sheet. "Weis No. 4256, Made in U.S.A., Supreme Pennsylvania Quality, Pennzoil, Safe Lubrication" -- on label on card.