Petrol prices have pushed up a further 3p a litre in the last month, according to the AA.
The rise means the cost of petrol at the pumps has increased more than 10p a litre since February.
The average price has risen from 113.29p in mid-April to 116.42p now, while diesel has gone up from 118.83p to 120.70p.
Across the UK, Northern Ireland has the lowest average price, at 116p a litre, as well as the cheapest diesel, which is averaging 119.4p.
Scottish drivers are paying the most for their fuel, averaging 117p for petrol and 121.3p for diesel.
AA president Edmund King said: “Despite negative inflation in April, warning signals coming from the EU and the United States indicate that the 20-dollars-a-barrel leap in the price of oil since the beginning of the year is once again influencing the car-use and fuel-buying behaviour of drivers.
“Compared to May 2014, when petrol averaged around 130p a litre and diesel 136p, car-dependent families should be feeling much better off. However, as the AA has pointed out in the past, price surges at the pump and on the billboards trigger a negative response from drivers.”
