July 10, 1945, Menasha Record
Shortages for many things occurred during the Second World War, to include automobiles. Metals used for car manufacture were diverted to make airplanes, tactical vehicles and armaments to supply the troops engaged in fighting in the two theaters. So it's no wonder the oil companies of America saw fit to engage the public in encouraging the care and upkeep of the vehicles the public already possessed. It was not only a patriotic thing to do but also good business for the car care companies. This company took a humorous bent on the topic. But did cars of that era REALLY require an oil change every 1,000 miles?
Regarding your question, David: The service schedule in the owner's manual for my 1946 Dodge required oil changes every 1,000 miles. I suspect other cars of the era also required 1,000-mile oil changes. With current-technology oils, the oil change interval could probably be extended on those cars.
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