Fuel duty is due to increase again by 3p litre on August 1, the AA has warned.
June's AA Fuel Price Report shows that, since mid-May, average UK petrol prices have fallen 4.63p a litre, from 138.40 to 133.77.
This is on top of the 4.08p-a-litre fall the previous month and is the biggest monthly drop since the petrol price dived 5.4p a litre between mid-November and mid-December 2008.
Even so, the overall 8.71p-a-litre reduction in the pump price petrol since the 142.48p record on April 16 is still short of where it should be, the motoring group said.
More top news
The Scottish First Minister issued strong words after it was ruled the devolved powers will not get their own vote on triggering Brexit.
The widow of a man killed in the Tunisia terror attack has described how she "played dead" after they were both shot by the beach gunman.
A young doctor, who reached his fundraising target of £100,000 last week, has died of a cancer that runs in his family.