According to figures from the AA, in Wales, Unleaded was 135.0p per litre and Diesel was 143.1p per litre.
A report commissioned by the lobby group FairFuel UK claims that even a modest cut in fuel duty of 2.5p per litre would create 180,000 new jobs.
Quentin Willson, national spokesman for FairFuelUK said:
'We have shared the findings of this report with MPs and Ministers. However, with only weeks to go to the Budget, we are concerned that the Government is not listening and not taking on board the significance of these findings.
"For months, the Government has been wheeling out the same old argument that it 'can't afford to cut duty'. Here is concrete evidence that it can make such a cut! Families and businesses are being crushed by these cruel levels of tax - 82p on every litre we buy.
According to figures from the AA, in Wales unleaded fuel costs135.0 pence per litre and the price of diesel stands at 143.1 pence per litre.
In the UK, the average price of a litre of unleaded petrol hit 137.44 pence, a new record high. While the cost of diesel is currently 144.67 pence.
Protesters from across the UK will take to the streets of London tomorrow to rally against a proposed rise in fuel costs.
They will be calling on the government to cancel plans to increase the duty levied on petrol this August.