A drop of more than $10 a barrel in the cost of oil and a 4p-a-litre drop in the wholesale petrol price have so far barely dented average UK petrol prices.
However, an intense battle between supermarkets over the price of petrol, with Asda losing its long-held position as the nation's cheapest for petrol, offers strong hope of significant pump savings, the latest AA Fuel Price Report reveals.
Between mid-April and mid-May, average petrol prices have risen 1.14p a litre to 136.93. They set a new record of 137.43p last week but a 'flash crash' in the oil market, bringing Brent crude down from $125 to below $115, has so far knocked off half a penny.
Diesel prices have fallen even further over the past week. Having returned to the record of 143.04p a litre last Monday, the UK average price of diesel has dropped more than 1.5p to 141.49. A month ago the UK diesel price averaged 141.99p.