| 2026-05-10 | Gas giant? |
| 2025-06-06 | BP rival |
| 2023-08-23 | Gas company with toy trucks |
| 2023-07-02 | Oil company with toy trucks |
| 2022-09-17 | Name on a truck |
| 2022-04-29 | Victor ___, Nobel winner for the discovery of cosmic rays |
| 2021-11-21 | Name on a toy truck |
| 2021-04-03 | Big name in oil |
| 2020-03-30 | Gas company with toy trucks |
| 2019-03-17 | Oil magnate Leon who once owned the New York Jets |
| 2019-03-03 | Name on a green toy truck |
| 2018-05-22 | Dame Myra of piano fame |
| 2017-12-21 | Oil and gas giant |
| 2017-10-02 | Gas company famous for its toy trucks |
| 2016-10-24 | Gas company selling toy trucks |
| 2015-12-08 | Big name in oil |
| 2015-08-30 | Name on a toy truck |
| 2015-07-06 | Gas brand with a green-and-white logo |
| 2014-08-09 | ConocoPhillips competitor |
| 2014-06-21 | Energy company in the Fortune 100 |
| 2013-11-06 | Big name in 59-Down exploration |
| 2013-04-28 | Physiology Nobelist Walter Rudolf ___ |
| 2012-10-19 | Gas station name |
| 2011-12-30 | Russian chemist with a law of thermodynamics named after him |
| 2011-09-26 | Gas company famous for its toy trucks |
| 2011-05-08 | Pianist Myra |
| 2011-03-19 | BP competitor |
| 2011-02-16 | Physics Nobelist Victor who discovered cosmic radiation |
| 2009-05-19 | Name on toy fuel trucks |
| 2008-10-24 | Big name in oil |
| 2008-07-29 | Gas company that sells toy trucks |
| 2008-02-24 | Global energy company |
| 2008-02-10 | Pianist Dame Myra |
| 2007-08-31 | Amoco alternative |
| 2007-07-24 | Dame Myra |
| 2007-02-20 | Gas company with collectible toy trucks |
| 2006-04-29 | Big name in oil |
| 2006-03-05 | English pianist who was made a dame |
| 2006-02-19 | Gas company known for its toy trucks |
| 2004-08-17 | Pianist Dame Myra |
| 2004-05-16 | Oilman Leon who owned the New York Jets |
| 2004-04-05 | Amerada ___ (oil giant) |
| 2003-10-08 | Shell competitor |
| 2003-09-15 | Dame Myra |
| 2003-06-23 | Dame Myra |
| 2003-01-11 | Amerada ___ (Fortune 500 company) |
| 2001-06-24 | Amerada ___ (Fortune 500 company) |
| 2001-06-03 | Amerada ___ (petroleum giant) |
| 2001-05-15 | Pianist Dame Myra |
| 2000-02-16 | Pianist Myra |
| 1999-10-10 | Pianist Dame Myra |
| 1999-07-05 | Dame Myra |
| 1999-03-30 | Infamous Rudolf |
| 1999-03-29 | Pianist Myra |
| 1998-06-15 | Pianist Myra |
| 1998-06-09 | Pianist Myra |
| 1998-05-20 | Pianist Myra |
| 1998-02-05 | Pianist Myra |
| 1997-08-02 | Spandau's last prisoner |
| 1997-02-04 | Piano-playing Dame |
| 1996-11-15 | Dame Myra |
| 1996-08-11 | Amerada ___ (oil giant) |
| 1996-06-11 | Pianist Myra |