The supermarket chain Morrisons opens the first bioethanol filling pump in the South West in Bridgwater, Somerset, on Monday.
The bioethanol fuel can be used by specially-modified cars
The environmentally-friendly E85 fuel can be used by specially-modified cars manufactured by Saab and Ford.
The pump is one of a series being rolled out across the country, the first having opened at the company's Norwich forecourt last Wednesday.
The scheme is part of a project aimed at cutting carbon dioxide emissions.
Bioethanol can be made from agricultural produce including sugar beet and grain.
It forms a potent, but environmentally-friendly fuel when mixed in high volumes with low amounts of petrol.
Phil Maud, Morrisons' petrol director, said: "We believe that by encouraging the use of bioethanol E85 we can contribute to a reduction in the harmful effects to the environment caused by the burning of fossil fuels.
"Furthermore, creating demand for this product will, in the medium to long term, present major opportunities for UK farmers."