A car powered by cooking oil is to be used as a leading example of green energy at an eco festival in west Wales.
Daniel Blackburn travelled from Land's End to John O'Groats
Hundreds of people are expected to descend on the Pembrokeshire farm this weekend to hear about the advantages of bio fuels and renewable energy.
The car - which earlier this year completed a journey from Land's End to John O'Groats - will be one of the attractions at the festival which aims to promote energy saving methods.
Organisers hope the event will also encourage farmers to get involved in the production of crops which can be used as fuel.
John Quinn, host of the festival at the beef and sheep farm in Boncath, said : "We are trying to revive the local economy.
"We are looking for farmers to grow bio fuels - which are fuels made from crops such as linseed and oil seed rape."
The North Pembrokeshire Energy Group, who have organised the event hope to get more people interested in renewable energy.
Mr Quinn said becoming energy efficient was easy: "Some of the ways of saving energy are so simple that we don't even think of them.
"Buying energy saving bulbs, insulating the house, turning the heating down are all ways that we can save energy."
Attractions at the event at Rhydhowell Farm include talks on windfarms, bio fuels, solar power and a presentation from Daniel Blackburn, owner of the vegetable oil powered car.
Mr Blackburn, from Bwlch-y-groes, said substitute fuels do not have to affect performance: "It is amazingly simple, you can save money and do something good for the environment as well.
"With the problems we are having with global warming we have to find alternative ways of using fuel which doesn't lead to a build up of carbon dioxide."
"There was no noticeable loss in performance in the car and in fact I noticed better acceleration."
Last year the forestry worker paid £550 for a conversion kit from a German company which he installed on his Citroen ZX 1.9 diesel turbo himself.
Each month he informs the authorities how much vegetable oil he has used and estimates it costs him about 73p a litre - which is cheaper than diesel and perfectly legal.
Around 5,000 cars in Germany are run on cooking oil and farmers in Ireland are also converting their machinery.