British roadside assistance group RAC says that major retailers are choosing not to pass on in full the reductions in the wholesale price of unleaded petrol.
Petrol drivers still getting 'raw deal' despite record fall in pump prices - RAC
Petrol drivers continue to get a raw deal at the pumps despite a record price drop last month, according to new analysis.
The RAC said average forecourt prices sank to 169.8p per litre at the end of August, but should be around 161p due to current wholesale costs.
The 12.3p drop in average prices during August was the largest monthly drop in records dating back 22 years.
But the fall in wholesale costs means this "only tells part of the story", the RAC said.