Kind of a side line.
But the government introducing the bio diesel has meant other stuff like bread etc. has gone up due to the process in making it.
Its all a huge circle.
Where at all possible i check that the supplier uses WVO (waste veg oil), rather than fresh rape seed oil. I figure the only way to be truly green is to use something that would, ordinarily, be disposed of in a non useful way, as a replacement for something bad (fossil fuels)
Gives the chippys a cheap way to get rid of the oil after a couple of months