Grim... wrote:
It's legal if you declare and pay fuel duty on it. I *think* you can mix it with diesel (don't try it in a petrol car), or use a little meths to thin it out and run it nearly neat.
You can run it completely neat as long as you install a pre-heater for the oil.
Quote:
If you use used (ie. cooked with) vegetable oil, that's good for the environment, as it's recycling that oil. I don't know how the emissions compare, though.
If it's just been thrown in the tank it's not very good for the engine long term, as it doesn't atomise properly when cold, gums up the piston rings and so on (and this affects the emissions too). OTOH, no sulphur, which is good.
However, bigger problems result from using a food as a transport fuel. This just really isn't very sensible and is one reason that vegetable oil has jumped from about 30p to £1 per litre in the last year or so, since this became popularised. Not to mention rainforests being cleared to grow palm oil as a cash crop, and all the rest of it.
Back to the topic, I believe both Tescos and Sainsburys are rapidly swapping their home delivery fleets for electric vehicles, which is excellent.