Supermarkets Asda and Morrisons have reduced their fuel prices by 12p per litre for petrol and 8p per litre for diesel.
Motorists are typically driving nearly 450 miles each over the festive period, a survey suggests.
Motorists have been hit with a hike in fuel prices in recent weeks which have added up to £3 to the cost of filling up, official figures show.
Motorists could be hit by more fuel price rises due to the "dark cloud" of high oil prices, a motoring firm has warned.
Supermarkets have increased the price of petrol and diesel every day since the end of March, a new analysis shows.
Supermarkets should cut at least 2p per litre off the price of petrol and diesel amid falling wholesale costs, according to a motoring organisation.
Motorists have been hit with the largest weekly increase in fuel prices since early January, new data shows.
Motorists have been hit with a rise in the price of petrol and diesel for the third month in a row, according to new figures.
Fuel prices went up by more than 2p per litre last month, new figures show.
Motorists have been warned that the cheap fuel market may have bottomed out as the price of oil shows early signs of recovery.
Drivers will be able to fill up on diesel for less than £1 per litre after three supermarket giants slashed prices from today.
Asda has cut the price of petrol at all its filling stations to under £1 a litre for the second time, raising the stakes in the Christmas price war.
Many fuel retailers are expected to cut the price of petrol to £1 a litre in time for the Christmas getaway. The RAC believes the tumbling oil price will lead to a 3p drop for petrol and 5p for diesel. This would take average prices to around 103p for petrol and 104p for diesel, but experts predict prices will be even lower at many forecourts.