Drivers have been issued a warning by the RAC if they are planing to visit a petrol station this week.
It comes as prices are set to rise again, with retailers having failed to fully reflect the fall in wholesale prices, according to the RAC. The automotive services company warned wholesale diesel costs have plunged 32p per litre - but the pump price has only fallen by 20p in the same period.
The cost of petrol has dropped by 23p in the same period, however at the stations, the prices have only been reduced by 18p meaning those behind the wheel are paying over the odds, the experts say.
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The company, according to Birmingham Live, added that some retailers, including the UK's biggest supermarkets such as Tesco, Asda, Morrisons and Sainsbury's, keep " pump prices artificially high" and thus, making more money from drivers from every litre of fuel they sell.
RAC fuel spokesman Simon Williams said: "This is a galling situation for drivers who are struggling more than ever given the impacts of the wider cost-of-living crisis. The question now is whether retailers start to bump up their prices.
"This will depend on whether they decide to continue enjoying larger margins or let them return to more normal levels. Looking at current wholesale costs there is absolutely no justification for pump prices to rise.
"We urge the Government to focus on ensuring retailers quickly pass on savings to drivers every time there is significant downward movement in the wholesale price of fuel - not just to ensure drivers aren't treated unfairly, but also because there is a clear correlation between high fuel prices and higher levels of inflation."
The analysis backs up a report by competition watchdog the Competition and Markets Authority published last month, which said drivers were the victim of "rocket and feather" pricing in 2022.
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