National Geographic : 1917 Sep
ll llllllll111ll ll i iiiIIIIIIIIII III IIII IIIIIIIIII111111111111111I I Make this Chart your guide Look for it on your dealer's wall Y OUR oil runs low. You stop for a fresh supply. You now come to avital question. What oil will the deal er pour into your oil-reservoir? Will it be just "oil"-or will it be the correct lubricant for your engine? Among thousands of dealers this is what happens: The dealer recognizes the make of your car-and the year's model. He runs his finger down theVacuumOilCompany's Chart (shown above in miniature) until he finds your car's make and model. Then he supplies you with the grade of Gargoyle Mo biloils specified for your car by the Chart This oil will effect ively seal your piston rings against power-waste, gasoline- waste and oil-waste. Why are thousands of dealers placing such reliance inthisChart? Experience has taught them that something like 50% of all engine troubles are due to incor rect lubrication. They realize that scientific lubrication is a problem for specialists. Since the dealer has neither time nor equipment for study ing this intricate subject he draws on the experience of a recognized authority. That is why you find on his walls the large Chart of Recommendations, issued by the Vacuum Oil Company. If you inquire about the Chart you will find this: The Vacuum Oil Company for 50 years have specialized in scientific lubrication. Today their world-wide leadership in lubri cation matters is unquestioned in scientific circles. For years their Chart of Recommenda tions has been recognized as the scientific guide to correct automobile lubrication In keeping this Chart up to date, each "Mention the Geographic-It identifies you."