An annoucement by the AA has confirmed that the price of petrol has reached a three-year low. The average cost of petrol at the beginning of this week was 87.79p a litre compared with 88.27p at the end of December 2005. Diesel is now averaging 99.72p a litre - the lowest price since November 2007. For a typical UK family with two petrol cars they are spending £68.39 less a month on fuel compared to the peak fuel prices that gripped the UK earlier this year.