Does anyone have any experience of using biodiesel or other biofuel, or even electric cars? What are they like in practice? I have recently been using biodiesel (which passes all the tests and has winter additive) and found that for the first 50 litres or so it was great, but suddenly there was a loss of power going up hill and a 1.9 TDi drove slower than a Morris Minor. This has been rectified by topping up with normal diesel but I am not sure whether it was the actual biodiesel that caused the loss of power, or whether as some people say on the web it clogged the fuel filter by lifting mineral diesel residue (or even paint!?!) from the inside of the fuel tank. I know that in cold weather the biodiesel thickens, but I am surprised that it is already too cold in the south of England to drive on 100% biodiesel given the claims for it on the web. I am not going to stop using it, after all it's already paid for and sitting in my garage, and any reduction in fossil fuel use is great, but I would like to know if anybody else has had the same 'real life' problem?