The blue dinosaur-themed oil company in Cars is Dinoco.
Dinoco is a fictional petroleum and fuel brand that sponsors The King, the veteran race car competing in the Piston Cup. Its pale blue branding is one of the most recognizable visual details in the Cars universe, and the company’s owner, Tex, is closely associated with the Dinoco racing team.
The name and dinosaur logo are a playful reference to real-world petroleum branding, especially Sinclair Oil’s dinosaur mascot. Dinoco first appeared as a gas station in Toy Story before becoming a major racing sponsor in Cars. Its logo also appears in other Pixar-related details, including WALL-E and Toy Story 4.
A common mix-up is confusing Dinoco with Rust-eze, Lightning McQueen’s principal sponsor, or Octane Gain, another fictional racing brand. Allinol is instead the alternative fuel central to Cars 2. Dinoco is the oil company whose blue identity and dinosaur emblem define The King’s racing livery.