| Fuel grp. | 9 |
| Fuel gp. | 8 |
| Fuel gases | 10 |
| Fuel gas | 8 |
| Fuel frontman | 13 |
| Fuel from vegetable tissue | 26 |
| Fuel from the wetlands | 22 |
| Fuel from plants | 16 |
| Fuel from mines | 15 |
| Fuel from fens | 14 |
| Fuel from bogs | 14 |
| Fuel from a sump | 16 |
| Fuel from a mine | 16 |
| Fuel from a marsh | 17 |
| Fuel from a fen | 15 |
| Fuel from a bog | 15 |
| Fuel found in wetlands | 22 |
| Fuel found in all three theme entries | 37 |
| Fuel for the wealthy | 20 |
| Fuel for the fire | 17 |
| Fuel for the body | 17 |
| Fuel for some trucks | 20 |
| Fuel for some trips? | 20 |
| Fuel for some ranges | 20 |
| Fuel for some prop planes | 25 |
| Fuel for some guzzlers | 22 |
| Fuel for semis | 14 |
| Fuel for piston-engine airplanes | 32 |
| Fuel for old locomotives | 24 |
| Fuel for Miss Nightingale | 25 |
| Fuel for Fulton | 15 |
| Fuel for Flaherty | 17 |
| Fuel for Cinderella's coach? | 32 |
| Fuel for big rigs | 17 |
| Fuel for an old furnace | 23 |
| Fuel for an Aston-Martin | 24 |
| Fuel for an Aston Martin | 24 |
| Fuel for aerosols | 17 |
| Fuel for a Zeppelin | 19 |
| Fuel for a warp drive engine on "Star Trek" | 53 |
| Fuel for a Reo | 14 |
| Fuel for a lorry | 16 |
| Fuel for a lighter | 18 |
| Fuel for a Lib fire | 19 |
| Fuel for a Ford | 15 |
| Fuel for a firepit | 18 |
| Fuel for a Fiero | 16 |
| Fuel for a debate | 17 |
| Fuel for a camp stove | 21 |
| Fuel for a Bentley | 18 |
| Fuel finish | 11 |
| Fuel efficiency rater: Abbr. | 28 |
| Fuel efficiency measure | 23 |
| Fuel efficiency meas. | 21 |
| Fuel efficiency letters | 23 |
| Fuel efficiency abbr. | 21 |
| Fuel economy stat. | 18 |
| Fuel economy stat | 17 |
| Fuel economy org. | 17 |
| Fuel economy meas. | 18 |
| Fuel economy letters | 20 |
| Fuel economy consideration | 26 |
| Fuel economy authority, for short | 33 |
| Fuel distillation product | 25 |
| Fuel derived from petroleum, e.g. | 33 |
| Fuel derived from fermenting organic waste | 42 |
| Fuel derivable from biomass | 27 |
| Fuel delivery sys. | 18 |
| Fuel deliverer | 14 |
| Fuel cut from bogs | 18 |
| Fuel container | 14 |
| Fuel conduit | 12 |
| Fuel company absorbed by BP | 27 |
| Fuel choice | 11 |
| Fuel cell component | 19 |
| Fuel cartel, briefly | 20 |
| Fuel cartel's letters | 25 |
| Fuel cartel acronym | 19 |
| Fuel cartel (abbr.) | 19 |
| Fuel cartel | 11 |
| Fuel carrier | 12 |
| Fuel car for a steam locomotive | 31 |
| Fuel by the litre | 17 |
| Fuel brand with green and white stations | 40 |
| Fuel brand since 1926 | 21 |
| Fuel brand | 10 |
| Fuel blocks | 11 |
| Fuel at the pump | 16 |
| Fuel associated with midnight | 29 |
| Fuel again | 10 |
| Fuel additive? | 14 |
| Fuel additive, perhaps | 22 |
| Fuel additive on the NASCAR circuit | 35 |
| Fuel additive letters | 21 |
| Fuel additive brand | 19 |
| Fuel additive | 13 |
| Fuel a fire | 11 |
| Fuel (up) | 9 |
| Fuel "___ Gun" | 24 |
| Fuel "Jesus or ___" | 29 |