| HUMMER | Bygone vehicle known for its bad fuel economy |
| GASGUZZLER | Car with bad fuel economy |
| KARAOKEBAR | Establishment known for its bad music |
| SKUNK | Cat-size mammal known for it's bad odour (5) |
| FUTILE | If it's bad fuel, it is useless (6) |
| SALEM | US city infamous for its bad spelling (5) |
| BILLINGSGATE | British legislating blasted for its bad language (12) |
| BROOM | Gorse-like shrub of heaths and areas of open countryside/woodland; or, linked with "wagon" for the vehicle known in French as the "voiture balai" following the last rider in a road cycle race (5) |
| LEAFBUD | Bad fuel spoils sign of spring (4-3) |
| SALOONCAR | Vehicle known as a sedan automobile in the USA (6,3) |
| ESTATECAR | Vehicle known as a station wagon in the US (6,3) |
| TERRAIN | All - Armored Transport, vehicle known as an AT-AT in the Star Wars films (7) |
| MPG | Fuel economy measure, for short |
| EPA | Fuel economy authority, for short |
| BRAKES | Devices of cars, bikes and other wheeled vehicles, known informally as anchors (6) |
| MILESPERGALLON | For fuel economy, this writer's backing the French over tricky longer lap (5,3,6) |
| PER | How we Brits measure our fuel economy (5,3,6) |
| GALLON | How we Brits measure our fuel economy (5,3,6) |
| MILES | How we Brits measure our fuel economy (5,3,6) |
| RADIALTIRE | Innovation that improved fuel economy |
