Your right Vercades, there was much amusement a few years back when a guy in Llanelli, South Wales, started recycling cooking oil from a Chinese restaurant to run his car. It cost him virtually nothing and everyone is happy now he pays tax on it. Saves him a fortune (but the main dealer charges him a few bucks to get all the dim-sum out of his cylinder head and block
)
Here's a similar article from a guy who promotes this in the States.....
Tree hugging trucker
Bring it on, it's a winner all round as far as I can see.