An environmentally-conscious entrepreneur has attacked Government bio fuel duties as "confused" and accused them of "stifling" his business.
Clive Leadbetter is the coowner of Wolverhampton firm Dieselveg - one of the few UK enterprises that converts diesel cars to run on pure vegetable oil.
Vegetable oil is a cleaner fuel than traditional diesel, is sulphur-free and considered "CO2 neutral" - which means that CO2 released when the fuel is burnt is balanced by the CO2 absorbed by the vegetable while growing.
"It has so many benefits," said 42-year-old Mr Leadbetter, who started Dieselveg three years ago with his business partner Nicholas Hicken.
"Running cars on vegetable oil, such as rape seed, could boost the UK's farming industry and there's absolutely no waste - any leftover plant can be used as animal feed."
However, Mr Leadbetter believes the UK's Revenue and Excise office - which requires tests on every source of vegetable oil before it can be counted as a bio-fuel - has put off potential converts.
In order to qualify for a reduced 27p per litre bio-fuel duty, vegetable oil has to be tested for 0.005 per cent or less sulphur content and more than
96.5 per cent ester - a bio-oil standard. If it is not tested, drivers are forced to pay the full 47.1p per litre tax - which makes vegetable oil more expensive than diesel.
Mr Leadbetter said: "It's stupid to suggest that normal Joe Bloggs who has bought his oil from the local supermarket can use it to cook his bacon, but has to have it tested in a laboratory before he can use it in his car!"
However, the West Midlands division of Revenue and Excise maintain that the tests are necessary to ensure that sulphur is not added to vegetable oil to improve a vehicle's performance. It also warns of potential engine damage.
Mr Leadbetter, who previously worked in oil refineries, is unconvinced. He has been running his Toyota 4x4 on vegetable oil since 2001.
" I saw a television programme explaining that it was possible and, together with my business partner Nick, built a system from scratch. I haven't noticed a change in the performance at all," said Mr Leadbetter who lives in Bridgnorth.
Mr Leadbetter and Mr Hicken then decided to become a reseller for a fuel-conversion systems from German company ATG.
"Europe, especially Germany, has really embraced it as a fuel of the future. They have scrapped duty for vegetable oil so drivers are encouraged to switch. It seems this country isn't ready to switch yet - but we need to wake up.
"I've been approached by hauliers and coach companies from all over the country that want to avoid high-fuel prices by switching, but they're being discouraged by the confusion on duties and a the lack of available supply - it's nuts!"
So far the two-man team has converted over 300 cars, 20 trucks and a number of courier vans to vegetable oil and hope that a change in legislation will pave the way for a revolution in the way cars are powered.
Mr Leadbetter said: "At the moment, this business is built on love and charity and it has been a testament to how hard we have worked that it is still operating today."
"We've been really encouraged by our customers who have realised the benefits of converting to vegetable oil - we already have thousands of names on a petition to change the duty laws."
The company hopes to begin producing their own vegetable oil that Revenue and Excise will recognise as a bio-fuel, but currently lack investment fund for a pressing plant.
"We need an entrepreneur like Richard Branson to help us," Mr Leadbetter said. "This company has great business potential, but it needs a good business head and financial clout to make it happen.
"It's a shame it couldn't have been easier."