Most expensive supermarket for petrol revealed – and how to save at the pumps [Video]

THE most expensive and cheapest supermarkets to refill your car’s tank at have been revealed.

Data from RAC Fuel Watch found that fuel prices have fallen slightly in the last month, but warned that motorists are still being ripped off at the pumps.

The RAC has accused retailers of dragging their heels when it comes to cutting prices, given that wholesale fuel costs have been falling for more than a month.

The average cost of a litre of unleaded petrol fell by 2.4p to 147.88p in May, while diesel prices fell by an average of 4.5p a litre to 153.58p.

But, supermarkets have been slower to cut their prices with the cost of unleaded petrol falling by an average of just 1.2p across retailers’ forecourts, the RAC found.

Garages cut diesel costs by a smaller amount too, with the average price seeing a reduction of just 3.4p …