Getty ImagesThe price of a litre of petrol has risen above 150p a litre for the first time since May 2024, with diesel averaging over 177p, a month after the US and Israel launched attacks on Iran.The latest figures from the motoring organisation RAC show the conflict is continuing to push up fuel prices, although they remain below the peaks seen after Russia's invasion of Ukraine.On Friday, wholesale oil prices rose back above $110 for a barrel of Brent Crude, despite US President Donald Trump saying he would postpone plans to start destroying Iranian energy plants by another 10 days.The RAC said the latest price rise was an "unwelcome milestone"."With the long-awaited four-day Easter weekend almost within touching distance, the cost of getting away by car is going to be noticeably higher this year," said RAC head of policy Simon Williams.Unleaded petrol is now 17p more per litre than before the conflict began. Diesel is 35p per litre more expensive.The RAC's advice for drivers is to "plan carefully" where they refuel, making use of apps that allow them to compare prices at local outlets.Wholesale oil prices have fluctuated between $73 and $116 a barrel for Brent Crude over the past four weeks, driven by traders' views of whether the flow of oil out of the Middle East was set to get easier or more difficult.Late on Thursday Trump said talks with Iran were going "very well" and that he was holding off on military strikes on Iran's energy infrastructure until at least 6 April.In the past such pronouncements have helped to calm the markets.However, Russ Mould investment director at AJ Bell said comments out of Washington and Tehran seemed to come from "parallel worlds".Higher wholesale prices push up prices at the pump, often with a slight delay, although a big proportion of the overall fuel price is made up of the cost of transport, processing, retail and tax.How high could UK petrol and diesel prices go?Why did US and Israel attack Iran and how long could the war last?Prepare for turbulence - how a prolonged Middle East conflict could reshape how we flyOilFuelOil & Gas industryMotoring