| Answer | Crossword Clue |
|---|---|
| COALED | Provided fuel for an engine |
| DIESELIZE | Equip with an engine using oil as fuel. |
| AVGAS | Fuel for piston-engine aircraft |
| AVGAS | Fuel for piston-engine airplanes |
| ANTIMATTER | Fuel for a warp drive engine on "Star Trek" |
| CEILED | Provided an upper surface for |
