Petrol prices are expected to rise by as much as four pence per litre over the next few days due to the rising wholesale price of fuel.
The Petrol Retailers Association (PRA) claims that the wholesale price of fuel has risen by around five pence per litre since Christmas.
PRA chairman Brian Madderson told the Daily Telegraph: "Independent retailers have been soaking up this increase at the expense of already tight margins because they know how hard the motorist is squeezed. But the floodgates will have to open soon."
Petrol is currently selling for 132.71p per litre and diesel for 140.32 per litre, according to the AA Fuel Price Report.
The news comes a week before the Office of Fair Trading decides whether or not to launch an investigation into fuel prices. The fuel industry has come under scrutiny over the past months following a reduction in the price of crude oil and speculation as to whether or not this saving was being passed on to consumers.