Petrol prices to fall 7p a litre by Christmas, RAC predicts

Motorists to benefit as cost of oil drops beneath $50-a-barrel for first time in three and a half years

The best fuel-saving tip of all: buy a smaller car

Go from a 4x4 to a supermini and everything - not just petrol - gets cheaper, writes Huma Qureshi

Dodge Avengers with leather seats sold out — but there were far fewer takers when they were simply half price

Supermarket chain, which operates 172 filling stations, will lower the price of a litre of unleaded from tomorrow morning from 94.9p to 92.9p

Analysis by the Guardian has shows petrol is still expensive in relation to the global oil price

Drivers could save up to £162 a year on petrol with a GPS system that directs them to their cheapest pump

Customers ought to be taking advantage of plummeting price of oil, says prime minister

Darling tells oil companies to pass on benefits of price falls to consumers as Shell reports increased third-quarter profits

Tell us how much you are paying for a litre of petrol at your local garage

Jessica Bown reviews the market for new and used cars and how the credit crunch is forcing dealers to offer deals

Asda and Sainsbury's say they will reduce the cost of a litre of unleaded to below 95p from tomorrow

Morrisons sparks second round of price cuts by reducing price of a litre to 97.9p

PM says Office of Fair Trading will monitor prices to ensure retailers are not profiteering

PM criticises some retailers for not cutting the cost of fuel in response to falling oil prices

Asda and Morrisons slash costs to reflect fall in the price of oil