| Clue | Source | Date |
|---|---|---|
| Brand that merged with Phillips Petroleum in 2002 | Wall Street Journal | 30 May 2026 |
| Phillips Petroleum merger partner | Newsday | 24 Oct 2024 |
| Phillips 66 brand | LA Times Daily | 16 Sep 2021 |
| Phillips 66 brand | ||
| Phillips Petroleum merger partner | ||
| Shell or Exxon rival |