these petrol vs derv threads are great . the only reason people buy the derv is because they cant / dont want to afford the petrol . if you are young or skint the derv is the best option for fuel and insurance . i dont mind filling up every other day but if i had other things to pay for like a house or insurance i would of gone for the derv but there is no way the dervs are better than the petrol until they make them sound better and not smoke petrols will allways come out on top