Sinclair Oil Corporation
| File:Sinclair Oil Logo.svg Sinclair logo featuring a green Brontosaurus dinosaur | |
| Company type | Private |
|---|---|
| Industry | Petroleum |
| Founded | May 1, 1916 in New York, United States |
| Founder | Harry F. Sinclair |
| Headquarters | Salt Lake City , United States |
Area served | Western and Midwestern United States, with smaller presence in other states |
Key people | Robert E. Holding (former CEO and proprietor), Carol Holding (CEO) |
| Products | Gasoline (Dino Supreme, Dino), motor oils (Dino Supreme, Opaline), Turbo-S aircraft lubricants |
Number of employees | 1200 (2019) |
| Website | www |
Sinclair Oil Corporation was an American oil enterprise established by Harry F. Sinclair on May 1, 1916. The Sinclair Oil and Refining Corporation was created through the merger of six smaller oil companies. Initially incorporated in New York, the firm later reestablished its incorporation in Wyoming in 1976. Its emblem featured a green Brontosaurus dinosaur, representing the widely held notion at the time that oil reserves originated from ancient prehistoric life.
As one of the largest privately held firms in the United States, Sinclair managed a diverse portfolio including refineries, fuel stations, hotels, a ski resort, and a cattle ranch. Prominent leaders included former CEO and proprietor Robert E. Holding alongside CEO Carol Holding. The company’s main office was located in Salt Lake City, Utah, employing around 1,200 staff members as of 2019.
History
The Sinclair brand has been a familiar presence within the American petroleum sector, distinguished by its dinosaur mascot and logo featuring a Brontosaurus.
1916–1969
On April 27, 1916, Sinclair was established by merging several smaller companies such as Cudahy Refining Co., Chanute Refining Co., Milliken Refining Co., Milliken Pipe Line Co., Slick Oil Co., and Beaver Oil & Gas Co. At its inception, Sinclair issued $16 million in convertible bonds and raised an additional $4 million before January 1917; nearly all these bonds were converted into common stock by mid-1917.
At the time of formation, Sinclair controlled multiple refineries with a total processing capacity of 20,000 barrels per day: Vinita (12,000 bpd), Cushing (8,000 bpd), Chanute (2,500 bpd), Coffeyville (4,000 bpd), plus a smaller facility in Muskogee (800 bpd). Plans for growth included establishing new refineries in Kansas City (5,000 bpd) and Chicago (10,000 bpd). By 1918, the company completed an 800-mile pipeline connecting Drumright to Chicago, strengthening its midstream infrastructure.
By November 1917, Sinclair reported assets valued at $80 million. Its common stock was actively traded on the New York Curb Market throughout the 1910s and 1920s, reflecting strong investor engagement with its expansion.
In 1919, Sinclair undertook corporate restructuring by merging Sinclair Oil & Refining Corporation, Sinclair Gulf Corporation, and other subsidiaries into Sinclair Consolidated Oil Corporation. This reorganization simplified its corporate framework and broadened its international reach. The company was renamed Consolidated Oil Corporation in 1932 and later reverted to Sinclair Oil Corporation in 1943.
Sinclair’s pipeline division attracted investment from Standard Oil of Indiana, which acquired a half stake in 1921 and completed full ownership during the Great Depression for $72.5 million. This strategic transaction improved Sinclair’s financial standing during economic hardship.
Between 1921 and 1922, Sinclair obtained oil production leases at Teapot Dome without competitive bidding—a controversial action that resulted in the notorious Teapot Dome scandal affecting the company’s reputation.
On the international front, Sinclair secured exclusive drilling privileges in Italy through negotiations with Benito Mussolini’s fascist regime in 1924. This agreement granted Sinclair monopoly rights over Italian oil exploration but involved substantial payments to fascist intermediaries; it was later criticized for corruption and collusion involving Standard Oil.
During the Great Depression era, Sinclair aggressively expanded by acquiring distressed petroleum companies and assets. In 1932, it purchased Prairie Oil & Gas’ pipelines and producing entities in the southern United States, gaining controlling interest in Producers and Refiners Corporation (Parco), which it fully absorbed following Parco’s receivership in 1934. In 1936, Sinclair acquired Richfield Oil’s East Coast marketing subsidiary and played a significant role in Richfield’s restructuring—Richfield would later merge with Atlantic Refining to form ARCO.
Additional growth came through acquisitions such as Pierce Petroleum Corporation in 1930 and Penn-Mex Fuel Company in 1932.
In the early 1960s, Sinclair innovated with Turbo-S aircraft lubricants developed alongside Henry W. Peters and Eric Woods. These products aimed to enhance reliability for commercial jets, military aircraft, missiles, and space vehicles—highlighting technological advancement within its product lines.
| Year | Revenue (million USD) | Rank | Profits (million USD) | Rank | Assets (million USD) | Rank |
|---|---|---|---|---|---|---|
| 1955 | 1,021.5 | 21 | 91.6 | 13 | 1,186.8 | 14 |
| 1957 | 1,180.1 | 24 | 95.9 | 17 | 1,473.3 | 13 |
| 1958 | 1,251.1 | 24 | 79.3 | 21 | 1,480.6 | 15 |
| 1961 | 1,222.4 | 29 | 52.5 | 36 | 1,486.6 | 20 |
| 1965 | 1,187.3 | 46 | 58.7 | 55 | 1,637.6 | 22 |
| 1966 | 1,275.5 | 44 | 76.7 | 49 | 1,694.5 | 27 |
| 1968 | 1,483.1 | 47 | 95.4 | 44 | 1,810.2 | 36 |
| 1969 | 1,465.1 | 58 | 76.6 | 64 | 1,851.3 | 39 |
ARCO era
In 1969, Sinclair combined forces with Atlantic Richfield Company (ARCO) following a competing bid by Gulf+Western Industries. Due to federal antitrust regulations, Sinclair was required to divest certain assets, resulting in the transfer of its East Coast operations to BP. After the merger, numerous Sinclair stations in the Midwest continued to display the dinosaur emblem instead of switching to ARCO’s "diamond spark" logo. In the Northwest, some locations featured a hybrid design incorporating ARCO’s blue rectangular symbol alongside the Sinclair name.
Holding era
By 1976, ARCO divested Sinclair through asset sales to Robert (Earl) Holding. This transaction included ARCO’s retail outlets situated between the Mississippi River and Rocky Mountains, along with rights to use the Sinclair brand and logo. Consequently, many stations along Interstate 80 preserved the dinosaur insignia. Meanwhile, ARCO retained control of stations in Texas, New Mexico, Illinois, and parts of Oklahoma until it withdrew from these states during the 1980s.
Sinclair’s headquarters were located in Salt Lake City, ranking it as the 94th-largest private company in the United States. The company operated approximately 2,607 service stations across 20 Western and Midwestern states. By 2010, Sinclair owned two refineries in Casper and Sinclair, Wyoming, having sold its Tulsa refinery to Holly Corporation a year earlier. Additionally, Sinclair managed close to 1,000 miles of pipeline infrastructure.
During the mid-2010s, Sinclair pursued rapid growth in southern California markets such as Los Angeles, San Diego, and Fresno by offering incentives for stations to convert to its brand. By 2018, its network extended through multiple Western and Midwestern states with smaller footprints in Arizona, Connecticut, Kansas, Kentucky, New York, Texas, Washington, Arkansas, and Wisconsin.
The company continued to emphasize its signature green dinosaur mascot "Dino" as a central branding element. Its proprietary gasoline additive SG-2000 supported fuel products marketed under names like "Dino Supreme" (premium grade) and "Dino" (regular), maintaining a tradition from 1961 when branded fuels were common industry practice. Product lines also included Dino Supreme and Opaline motor oils.
In August 2021, HollyFrontier announced plans to acquire Sinclair Oil and create HF Sinclair Corporation in 2022. This merger combined Sinclair’s branded marketing operations, Wyoming refineries, logistics assets—including roughly 1,200 miles of pipelines—and terminals with HollyFrontier’s business and Holly Energy Partners. The majority of Sinclair staff were expected to remain employed after the merger. Notably, exploration and production assets held by Sinclair Oil & Gas Co. were excluded from this agreement.
Sinclair Trucking Company
Sinclair Trucking Company—wholly owned by Sinclair—handled distribution for Sinclair Oil fuels and related products. It operated terminals at strategic sites including Flagstaff (Arizona), Denver (Colorado), Des Moines (Iowa), Kansas City (Kansas), Minneapolis (Minnesota), St. Louis (Missouri), Omaha (Nebraska), Shawnee and Tulsa (Oklahoma), Salt Lake City (Utah), Casper and Sinclair (Wyoming), and Carrollton (Missouri).
Grand America Hotels & Resorts
Sinclair's portfolio also included Grand America Hotels & Resorts, which encompassed locations in Salt Lake City (Utah), Flagstaff (Arizona), Cheyenne and Little America (Wyoming), San Diego (California), along with the Sun Valley and Snowbasin ski resorts. These hospitality properties remained under the ownership of the Holding Family and were not part of the transaction with HollyFrontier.
HF Sinclair Corporation
In March 2022, HollyFrontier finalized its purchase of Sinclair's refining operations, leading to the creation of HF Sinclair Corporation. This new entity is publicly traded on the New York Stock Exchange under the symbol DINO.
In popular culture
At the 1933–1934 Chicago World's Fair, Sinclair sponsored a dinosaur-themed exhibit that connected petroleum's origins to prehistoric eras, forming a central aspect of its branding approach. The display included a 2-ton animated Brontosaurus, which inspired various promotional items such as rubber dinosaur toys and inflatable mascots, effectively boosting brand visibility through memorable marketing.
During the 1964–1965 New York World's Fair, Sinclair presented "Dinoland," featuring life-sized dinosaur replicas including their iconic Brontosaurus. After the event, these models toured as mobile exhibits before being allocated to museums like Dinosaur Valley State Park in Texas and the Kentucky Science Center. Several of these figures continue to be exhibited at major institutions, maintaining Sinclair’s lasting cultural footprint.
The "Sinclair's Dino" balloon made its debut in the Macy's Thanksgiving Day Parade in 1963 and reappeared in 2015. Recognized by New York’s Museum of Natural History since 1977, this balloon measures 36 feet in height and 72 feet in length, symbolizing the company’s distinctive market presence through iconic imagery.
Sinclair’s Brontosaurus emblem has inspired parodies in prominent film series such as Toy Story and Cars, underscoring its cultural significance within the petroleum sector. The television show Dinosaurs featured characters named after fossil fuel corporations, including a Sinclair family, highlighting the brand’s integration into popular media.
A former Sinclair gas station located in Montgomery, Alabama’s Cloverdale area was converted into a restaurant called Sinclair's in 1992. While some branches closed by 2018, one eastside location has continued operating for nearly thirty years as of 2023.
Interestingly, Joey Jordison, the founding drummer of Slipknot, was employed at a Sinclair garage in Urbandale, Iowa—demonstrating the company's diverse connections to various industries and communities.
Distribution
In the initial ten months of 1930, Sinclair Refining—Sinclair Oil's marketing arm—acquired 1,511 bulk distribution facilities, service stations, resale outlets, and businesses from 59 affiliated companies. Furthermore, Sinclair purchased seven bulk plants and fifty-two service stations from private owners and secured long-term leases on ten bulk plants along with 169 service stations.
| Alabama | 2 | Petroleum Products Co. (La Fayette), Consumers Oil Co. (Bay Minette) |
| Arkansas | 5 | Home Oil Co. (Ashdon), Royal Oil Co. (Little Rock), Warden Oil Co. (North L. Rock), Burton Oil Co. (Nettleton), Guenters Inc. (Little Rock) |
| Connecticut | 2 | Thomaston Land & Impr. Co. (Thomaston), Paramount Oil Co. (New Haven) |
| Georgia | 1 | Marion County Oil Co (Buena Vista) |
| Illinois | 2 | Kay Oil Co. (Pontiac), Red Eagle Oil Co. (Canton) |
| Louisiana | 1 | Liberty Products Co. (Ponchatoula) |
| Michigan | 2 | Des Jardins Oil Co. (Marquette), Decker Oil & Gas Co. (Decker) |
| Mississippi | 1 | Winston Oil Co. (Noxapater) |
| New York | 5 | Seider Oil Co. (Hamburg), Superb Oil Co. (Haverstraw), Fay C. Adams Oil Co. (Syracuse), Kissan Oil Co. (Watkins Glen), Conine & Cooper (Bath) |
| North Carolina | 4 | Piedmont Oil Co. (Gastonia), Imperial Gas & Oil Co. (Winston-Salem), Napoleon Oil Co. (Marion), Cleveland Oil Co. (Shelby) |
| Ohio | 5 | Public Service Oil Co. (east-central Ohio), H.R. Johnson Oil Co. (Baltimore), Court Gas & Supply Co. (Marietta), Regal Oil Co. (Piqua), Community Oil Co. (Jackson Center) |
| Pennsylvania | 1 | Crader Oil & Supply Co. (Towanda) |
| South Carolina | 4 | Swansea Gas & Oil Co. (Swansea), Superior Oil Co. (Batesburg), Calvert Oil Co. (Abbeville), Citizens Oil Co. (Seneca) |
| Texas | 14 | Brazos Oil Co. (Richmond), Sanders Oil Co. (Brenham), Blalock's Tire Store (Huntsville), Gerlach Bros. (Livingston), Dixon Oil Co. (Burton), Home Petroleum Co. (Huntsville), Arnst Bros. (Kingsville), Willis Mercantile Co. (Willis), Home Petroleum Co. (Madisonville), Waller County Oil Co. (Waller), Home Oil Co. (Sweetwater), Doupbitt & McAskill (Edinburg), Eagle Lake Grain Co. (Eagle Lake), Perry Oil Co. (Freeport) |
| Virginia | 7 | Fulton Oil Co. (Gate City), Russel Gas Co. (Honaker), Midland Oil & Gas Co. (Abingdon), Blue Ridge Oil Co. (The Plains), U.S. Oil Co. (South Hill), Monticello Oil & Gas Co. (Charlottesville), Central Oil Co. (Norton) |
| West Virginia | 1 | Arrowhead Gasoline Co. (Cameron) |
| Wisconsin | 2 | Conley Oil Co. (Eau Claire), Eagle Oil Co. (Shawano) |
See also
External links
- Articles with short description
- Pages with broken file links
- Sinclair Oil Corporation
- 1916 establishments in Utah
- ARCO
- Automotive fuel retailers
- Companies based in Salt Lake City
- Economy of the Midwestern United States
- Economy of the Western United States
- Fictional dinosaurs
- Gas stations in the United States
- American companies established in 1916
- Retail companies established in 1916
- Energy companies established in 1916
- Non-renewable resource companies established in 1916
- Oil companies of the United States
- Privately held companies based in Utah
- 2022 mergers and acquisitions
- Companies formerly listed on the New York Stock Exchange
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- Companies of the United States by year of establishment