Asda is the “first major supermarket” to cut fuel prices at its forecourts, analysis of RAC Fuel Watch data shows.
Asda is now charging an average of 153.5p for petrol and 176.7p for diesel – around 2p less than its rivals.
RAC fuel spokesman Simon Williams said: “Our data shows that, without advertising the fact, Asda has taken an average of 4.5p off the cost of litre of unleaded across its 320 sites in the last two days, and around 5.5p off diesel.
“While we’re pleased one major supermarket retailer has finally started heeding our calls to pass on the enormous drop in the wholesale prices of both fuels, the fact these price cuts have been made so quietly is surely admission that they should have come much sooner.
“We urge the other three supermarkets to catch up quickly – or go even further – and give drivers some much-needed relief from high prices next time they fill up.
“If they do, this will bring the UK average petrol price down from its current 157.8p which benefit drivers everywhere.
“Despite these reductions our analysis of wholesale data shows this should really be just the beginning as there’s easily scope for another 10p a litre to come off the current average price of both petrol and diesel.
“Perhaps it will be Asda which once again takes a leadership position by further cutting its prices to help drivers save money in the run-up to Christmas.”