| Subject | Spanish | English |
| earth.sc., mech.eng. | bomba de fuel-oil | fuel oil transfer pump |
| el.gen. | caldera de fuel-oiI | liquid fuel boiler |
| mech.eng. | caldera de fuel-oil | liquid fuel boiler |
| environ. | Cenizas volantes de fuel | oil fly ash |
| nat.sc., energ.ind. | combustión de fuel destilado | distillate oil combustion |
| nat.sc., energ.ind. | combustión de fuel residual | residual oil combustion |
| energ.ind. | fuel doméstico | light fuel oil |
| energ.ind. | fuel doméstico | domestic fuel oil |
| energ.ind. | fuel doméstico | home-heating fuel |
| gen. | fuel ERA | fuel ERA aerodrome |
| gen. | fuel ERA | fuel en-route alternate aerodrome |
| energ.ind. | fuel ligero | home-heating fuel |
| energ.ind. | fuel ligero | light fuel oil |
| energ.ind. | fuel ligero | domestic fuel oil |
| energ.ind. | fuel medio | medium fuel oil |
| chem. | fuel-oil | fuel oil |
| transp., energ.ind., oil | fuel pesado | bunker oil |
| transp., energ.ind., oil | fuel pesado | bunker fuel |
| tax., energ.ind. | fuelóleo BIA, fuel BIA | low sulphur fuel oil |
| agric., el. | funcionamiento dual-fuel | dual fuel operation |
| transp. | locomotora calentada por fuel-oil | oil-burning locomotive |
| coal. | nitrato-fuel | anfo |
| coal. | nitrato-fuel | ammonium nitrate and fuel oil |
| transp., avia., energ.ind. | queroseno tipo jet fuel | kerosene type jet fuel |
| energ.ind. | residuo de fuel-oil pesado | heavy fuel oil residual |
| tech. | vea "fuel" | fuel air explosive |
