Historical clue formulations

• Gas company with a triangular logo — 2026-04-02
• Gas brand with a triangular logo — 2022-02-09
• Gas brand whose logo has a red triangle — 2018-10-22
• Sunoco competitor — 2018-01-15
• Oil company with a triangular logo — 2017-09-04
• Gas brand with a triangular logo — 2015-05-14
• Exxon competitor — 2008-05-05
• Gulf rival — 1995-05-06