As the United States marks its 250th anniversary, WTOP presents “250 Years of America,” a multipart series examining the innovations, breakthroughs and pivotal moments that have shaped the nation since 1776.
The American Petroleum Institute is proud to partner with WTOP to bring you this series.
Long before oil powered cars, it was dabbed on skin and even swallowed in small doses when it was sold as a cure-all.
In the early 19th century, people in northwestern Pennsylvania collected thick, dark oil that naturally seeped to the surface.
The substance, often skimmed from water or soaked up with cloth, became known as “Seneca Oil.” The name reflected its association with Native American knowledge, particularly that of the Seneca Nation.
For generations, Indigenous communities had been aware of the oil seeps in that area.
“Paleo-Indians knew where the seeps were in Pennsylvania, where it seeps naturally out of the ground,” said Brian Black, professor of history and environmental studies at Penn State Altoona.
“They would gather it with cloth,” said Black. “They didn’t drill for it. It was just naturally coming out.”
Others avoided those areas, believing it was pointless.
“European settlers knew not to go there, because the oil had seeped through the soil, so it was not good for agriculture,” Black said.
But when the first settlers discovered that the oil might have some effect on the human body, interest grew.
By the early 1800s, Seneca Oil was being sold across the northeastern United States as a form of patent medicine.
“They bottled it, and they began just marketing it,” Black said.
Marketing crude as a cure-all
Advertisements claimed it could treat everything from joint stiffness to digestive issues.
Traveling salespersons often leaned on its Indigenous origins to make it sound more credible.
It was part of a broader culture of early American medicine, where regulation was minimal and remedies were often based on anecdotal evidence rather than scientific testing.
Facing limited access to trained doctors, consumers frequently turned to widely marketed cure-alls like Seneca Oil.
“Oil was well known,” Black said. “What wasn’t known was what to do with it.”
That would soon change.
In 1859, Edwin Drake drilled the first successful commercial oil well near Oil Creek, ushering in a new era.
What had once been gathered by hand in small amounts quickly became the focus of an industrial boom.
From medicine to fuel
Long before modern regulatory agencies existed, products like Seneca Oil were free to make broad health claims.
While some users may have experienced relief, little scientific evidence supported the advertised benefits.
By the late 19th century, as medical science advanced, those types of medicines started to become less popular.
Increased scrutiny, along with the rise of traditional pharmaceuticals, pushed products like Seneca Oil aside.
Today, visitors to the Oil Creek region in Pennsylvania can still find traces of that history.
Museums and historical sites tell the story of how once-overlooked natural seeps became the birthplace of America’s oil industry and how, for a time, that same substance was believed to heal.
It’s a reminder that the meaning of natural resources can shift over time, shaped by culture and perception.
In the case of Oil Creek, it all began with a simple sheen on the water, one that promised cures before it powered a nation.
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