February saw one of the largest drops in fuel prices in the past 20 years, new figures show.
The average price of petrol fell by 3p a litre to 124p last month, while diesel dropped by 4p to 127p, according to RAC Fuel Watch data.
These were the 19th and 11th largest monthly price drops for petrol and diesel respectively since the RAC began monitoring prices in 2000.
The cost of filling up a 55-litre family car with petrol is £1.61 less than it was in January, while a tank of diesel is £2.33 cheaper.
The pump price reductions have been driven by a $10 slump in the price of a barrel of oil from a high of $60 on 20 February.
RAC fuel spokesman Simon Williams said: "February was a good month for drivers with two rounds of supermarket price cuts, both led by Asda, which put an end to two consecutive monthly rises.
"These resulted in 3p being shaved off the average price of petrol and 4p off diesel.
"While it is good drivers are benefiting from lower forecourt prices, in reality the wholesale price is such that the big four supermarkets, which dominate UK fuel retailing, should cut their prices again.
"At the moment, both fuels are 6p a litre too expensive which means for petrol we should really be seeing a UK average of 118p."
