SALT LAKE CITY–(BUSINESS WIRE)–Sinclair Oil (Sinclair), an HF Sinclair (NYSE: DINO) brand, announced today its third annual DINO Days, a five-day customer promotion running June 1–5, 2026, in honor of National Dinosaur Day. DINO Days has grown from a one-day promotion in 2024 to a five-day event featuring fuel savings, games and chances to win DINO merchandise. The promotion begins Monday, June 1, on Facebook and Instagram (@sinclairoilcorp), where followers will help build the ultimate summe