DIESEL is being sold for about 17p per litre more on average than petrol, despite wholesale costs falling to similar levels, a motoring group said reports the BBC.
Average diesel prices are £1.64 per litre compared with £1.47 per litre for petrol, while both are priced at about £1.15 wholesale, the RAC said.
It said the difference was “scandalous” and that cuts in the wholesale price had not been passed on to customers.
Retailers said they “understood the cost pressures” drivers faced.
Supermarkets and private retailers buy fuel on the wholesale market to sell to consumers.
The RAC, which tracks and campaigns on fuel prices, said diesel wholesale prices had fallen and were now the same as petrol on average.
But Simon Williams, fuel spokesman for the motoring group, said there was “still more than 17p difference at the pump” which he described as “absolutely shocking”.
Mr Williams said given the amount wholesale prices had dropped, forecourts should have already reduced pump costs for diesel to about £1.52, and a further cut to £1.47 in the coming weeks should feed through.
When prices change in the wholesale market, they can take time to feed through to changes at the pumps, due to how frequently smaller sellers restock.
But Mr Williams said larger supermarkets, which dominate sales, had been given “plenty of time” to pass on lower prices to customers.
Supermarkets buy fuel more frequently than independent sellers.
“They [supermarkets] remain totally resolute in their refusal to cut their prices substantially which is nothing short of scandalous, particularly in a cost-of-living crisis,” he said.
“For retailers to be taking a margin of nearly 20p a litre on average throughout March, compared to the long-term average of 7p, is devastating for every driver and business that relies on diesel.”
However, the British Retail Consortium, which represents supermarkets, said: “Retailers understand the cost pressures facing motorists and will do everything they can to offer the best value-for-money across petrol forecourts.”
The trade body did not comment on the disparity in prices directly, but said because prices at the pump tend to lag behind wholesale prices, the recent falls in diesel wholesale prices were still filtering through to consumers.
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