Sunoco LP /səˈnoʊkoʊ/ is an American master limited partnership organized under Delaware state law and headquartered in Dallas, Texas.

It was previously engaged in oil, natural gas exploration and production, refining, chemical manufacturing, and retail fuel sales, but divested these businesses.

[3] The transaction also provided a long-term take or pay fuel supply agreement with 7-Eleven to generate consistent earnings and cash flows.

In 1886, its partners – Joseph Newton Pew, Philip Pisano, and Edward O. Emerson – decided to expand their fuel business with a stake in the new oil discoveries in Ohio and Pennsylvania.

Sun Oil established a facility at Venezuela's Lake Maracaibo in 1957, which produced over a billion barrels (160,000,000 m3) before the operation was nationalized in 1975.

In the late 1980s, it began rebranding DX stations in the Midwest to the Sunoco brand, but by the early 1990s, they pulled out of virtually all areas in the southeastern U.S. and west of the Mississippi, resulting in the closing and rebranding of service stations and jobbers to other brands in those areas, notably Sinclair in Oklahoma and Kerr-McGee in Arkansas.

It sold its remaining interest in Canada's Suncor Energy in 1995 but markets products from two refineries – one in Toledo, Ohio, and the other Sarnia, Ontario – in joint ventures.

In September 2009, Sunoco sold its retail heating oil and propane distribution business to Superior Plus for $82.5 million in cash.

[24][25] In Canada, the Sunoco brand was licensed for the Ontario retail fuel station operations of Suncor Energy until 2010.

Following Suncor's acquisition of Petro-Canada, all Canadian Sunoco outlets were converted to Petro–Canada branding,[26] except for one location in Port Colborne, Ontario, which closed in 2023.

Effective September 6, 2011, Sunoco announced that it would exit the crude oil refining business and seek to sell its Philadelphia and Marcus Hook, Pennsylvania refineries by mid-2012.

[27] The Marcus Hook facility, founded in 1902 and covering 781 acres, was dedicated exclusively to the processing of light sweet crude oil; this processing focus combined with volatility in crude oil prices are considered contributing factors to both this refinery's closure and Sunoco's exit from the refinery business.

[29] In September 2012, Sunoco formed a joint venture with The Carlyle Group, allowing for the continuation of operations at the Philadelphia refinery, and temporarily saving over 800 jobs.

[36] In 2000, Sunoco leaked 190,000 gallons of oil into the John Heinz National Wildlife Refuge at Tinicum in Pennsylvania through a cracked pipe.

Senator H. John Heinz was killed when his airplane collided with a Sun Company helicopter in what is known as the Merion air disaster.

The National Transportation Safety Board determined that the probable cause of the accident included poor judgment and errors on the behalf of both pilots.

Also in 2014, Sunoco LP acquired Aloha Petroleum, Ltd., a retail and wholesale fuel business with six terminals in Hawaii.

[49] In December 2015, the company completed its acquisition of Alta East, Inc., a wholesale motor fuel distribution business serving the northeast United States.

[51] In June 2016, Sunoco LP purchased Valentine Convenience stores, consisting of 18 locations selling more than 20 million gallons of fuel, as well as Texas–based Kolkhorst Petroleum, Inc. Kolkhorst operated 14 convenience stores under the Rattler's brand and distributed more than 46 million gallons of fuel.

[52][53] Denny Oil, a convenience store and wholesale distributor operator, was purchased by Sunoco LP in October 2016, adding an additional 90 million gallons of fuel to its distribution business.

[54] Sunoco diversified its portfolio in August 2016 with the acquisition of Emerge Energy Services LP, entering into the business of processing transmix fuels.

[58] On April 2, 2018, Sunoco announced the completion of the conversion of its 207 retail sites located in central west Texas, Oklahoma, and New Mexico markets to a single commission agent, Cal's Convenience, Inc.[59] That month also saw the acquisition of Superior Plus Energy Services, adding three terminals and approximately 200 million gallons to Sunoco LP's wholesale fuels business.

[69] In May 2023, the company completed the acquisition of 16 refined product terminals located across the East Coast and Midwest from Zenith Energy.

[76] In July 2024, Sunoco LP announced the formation of a joint venture with Energy Transfer to combine their crude oil and produced water-gathering assets in the Permian Basin.

Its enhanced fuel detergency helps keep engines clean and ensures compliance with tight vehicle emissions requirements.

[95][96] New for the 2012 IZOD IndyCar Series, Sunoco introduced a new ethanol fuel blend rate that was reduced to E85 formula in a reference of road car relevance.

[97] Following their participation in that event, Sunoco partnered with KV Racing and driver Tony Kanaan, who won the 2013 Indianapolis 500, for a four-race primary sponsorship agreement.

The Sunoco Injector, a branded fan engagement area built as part of the new speedway section opened during the Daytona 500 weekend.

[101] In 2020, defending series champion Zack Novak piloted the Sunoco sponsored entry, with Jimmy Mullis as his Richmond Raceway eSports teammate in the No.