Skeleton Made of Auto Parts Warns Motorist to Oil Up, 1938

In 1938, worn parts from a discarded automobile mounted on a board to represent a skeleton as a lesson in the need for correct lubrication for automobiles reminded patrons in a Green Bay, Wisconsin, gas station not to overlook the value of oil and grease in their cars.

This warning sign tells motorists how necessary it is to keep the car lubricated.