How much tax would i need to pay if i ran my car on cooking oil?

And where can I get the form to send to the taxman?How much tax would i need to pay if i ran my car on cooking oil?
why would tell the taxman? get your cooking oil from aldi,lidl or netto i am sure that will be the cheapest source.How much tax would i need to pay if i ran my car on cooking oil?
lol





i sen the cooking oil car on brainiac it only went 10ft and wrecked the engine so .. if you are looking for a car that travels a whole 10ft then brakes and is tax free then go for it
u need to mix the oil with regular diesel so you dont save much i have heard you need to declare it but dont know how