In 1953, H. A. “Dave” True Jr. and a partner formed True & Brown Oil Company and discovered oil in the Minnelusa Formation at Donkey Creek in the northern Powder River Basin of Wyoming.  The following year, Dave bought out his partner and changed the name to True Oil.  The company has operated under that name to this day, and continues to be a family-owned and operated Wyoming company, with headquarters located in Casper.

True Oil continued to make discoveries of oil and gas in the Powder River Basin, including a significant discovery in the Muddy formation at Clareton and a significant discovery in the Dakota formation at Coyote Creek.  Through the 1960’s and 1970’s operations were expanded into Montana and North Dakota.  Of significance was the discovery of oil at Red Wing Creek – a prehistoric astrobleme, or ancient meteorite crater, in 1972.  This was one of the first discoveries of oil at an astrobleme in oil and gas industry history! 

True Oil continued to operate through the oil busts of the 1980’s and 1990’s. In the late 1990’s and early 2000’s True Oil made gas discoveries in the Greater Green River Basin of southwest Wyoming.  Since 2010, True Oil has also operated unconventional oil wells in the Bakken Play of North Dakota and the Powder River Basin of Wyoming.  Along with its operated properties, True Oil has non-operated interests across the United States including Colorado, New Mexico, Kansas, Pennsylvania and Louisiana.