Sinclair Oil Corporation is an American petroleum corporation, founded by Harry F. Sinclair on May 1, 1916. Renowned for its iconic green Apatosaurus (Dino) logo, Sinclair has a long history in the U.S. energy landscape. The company's operations traditionally included oil and gas exploration, production, refining, and marketing of fuels, lubricants, and asphalt. Sinclair operates two notable refineries in Wyoming and markets its products through a network of over 1,600 branded gas stations primarily in the Western and Midwestern United States. In March 2022, Sinclair Oil was acquired by HollyFrontier Corporation, which subsequently rebranded as HF Sinclair Corporation (NYSE: DINO). The Sinclair brand, its refineries, and marketing operations continue as a significant part of HF Sinclair.
Serves as the main hub for Sinclair brand management, marketing strategy, downstream operational coordination, and administrative support for Sinclair-branded assets under HF Sinclair.
Located in the International Center II, a modern Class A office building within the Grand America Hotels & Resorts complex, offering contemporary facilities and a prominent downtown presence.
Historically, Sinclair maintained a culture influenced by its long family ownership, emphasizing loyalty and community. As part of HF Sinclair, it integrates into a larger corporate environment focused on safety, operational excellence, and financial performance, while preserving the heritage of the Sinclair brand.
The Salt Lake City office remains significant as the historical and ongoing center for the Sinclair brand, vital for its marketing presence and operational management in its key regions.
Sinclair Oil's operations are primarily concentrated in the United States. The company operates refineries in Wyoming and markets its fuel through an extensive network of branded gas stations, predominantly located in the Western and Midwestern U.S. While its parent company, HF Sinclair, has a broader North American reach and participates in global commodity markets, the Sinclair brand itself does not maintain significant international operational offices or a direct retail presence outside the U.S. Its global connection is mainly through the broader energy market activities of HF Sinclair.
550 E. South Temple, International Center II
Salt Lake City
Utah
USA
Address: Sinclair Refinery, P.O. Box 277, Sinclair, WY 82334
Supplies refined petroleum products to Sinclair's branded network and other customers across the Rocky Mountain states and central U.S., ensuring regional energy availability.
Address: Casper Refinery, 1700 E. Yellowstone Hwy, Evansville, WY 82636
Provides refined products and asphalt to markets in Wyoming and adjacent states, supporting both consumer fuel needs and infrastructure development.
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As of April 2025, Sinclair Oil' leadership includes:
Sinclair Oil has been backed by several prominent investors over the years, including:
In the last 12 months, HF Sinclair, the parent company of Sinclair Oil, experienced a key change in its executive leadership with the appointment of a new Chief Financial Officer.
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Email addresses for Sinclair Oil personnel, now part of HF Sinclair Corporation, typically follow common corporate structures. While specific patterns can vary, formats often involve combinations of first name, last name, and initials.
Common formats include [first_initial][last]@sinclairoil.com (e.g., jdoe@sinclairoil.com) or [first].[last]@sinclairoil.com (e.g., jane.doe@sinclairoil.com). Emails may also now use the @hfsinclair.com domain for corporate roles.
Format
jdoe@sinclairoil.com or jane.doe@sinclairoil.com
Example
75%
Success rate
HF Sinclair Corporation Investor Relations • May 7, 2024
HF Sinclair Corporation (NYSE: DINO) announced its Q1 2024 financial results, reporting net income attributable to stockholders of $116.2 million. The results included performance from its refining segment, which incorporates the legacy Sinclair refineries, and an update on strategic initiatives....more
PBR (Professional Bull Riders) • January 24, 2024
Sinclair Oil confirmed the renewal and expansion of its multi-year sponsorship with Professional Bull Riders. The partnership enhances Sinclair's brand visibility through event entitlements and various fan engagement activities, aligning with its iconic DINO brand and western heritage....more
Sinclair Oil Media Room • October 11, 2023
Sinclair Oil announced the introduction of its DINOCARE® TOP TIER® Diesel Fuel. This advanced diesel product is formulated to protect modern diesel engines, improve efficiency, and will be available across Sinclair's network of branded fuel stations....more
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