Copied and pasted from Wikipedia
Skunk oil is an oil that is obtained from the two lateral glands that run the length of a Skunk’s back. Skunks store fat in these glands for use during hibernation or semi-hibernation in warmer climates. Skunk oil has minimal odor
Skunk oil was used by the Native Americans as a healing balm or liniment. When rendered from the glands over a low heat, it has the consistency of an SAE 10 motor oil, and the feel of coal oil. When applied to the skin it gives a warming sensation as a mild liniment would. The early explorers and fur buyers, especially in Canada, found that the oil was a very useful addition to their medical kits and paid the natives a premium price for it.