Historical clue formulations

• Camper's fuel — 2024-03-30
• Gas for a tank — 2023-04-06
• Barbecue griller's purchase — 2019-03-28
• Balloonist's tankful — 2018-09-07
• C3H8, familiarly — 2018-08-24
• Charcoal alternative — 2010-09-05
• Gas log fuel — 2010-04-19
• Barbecuer's buy — 2004-09-01
• Tank contents — 2003-05-04
• Tank gas — 1994-05-11