The surge in the price of oil has scuppered hopes that petrol prices would stop increasing, according to figures.
As oil nears 50 US dollars a barrel the average price of petrol reached 109.2 pence per litre (ppl) earlier this week, the AA said.
This is a 1.9p rise since April 16.
Compared to when petrol reached its low point in early March the cost of filling a tank has gone up by over £4.
Meanwhile pump prices for diesel have increased from 106.9ppl on April 16 to 109.1ppl.
AA president Edmund King said: "Compared to this time last year, petrol is still 6.5p and diesel 11p a litre cheaper.
"However, that's not the point. UK drivers do not like pump price shocks and a £4-£5 surge in the cost of a tank of fuel is enough to disrupt family and business budgets.
"What has happened since March has re-energised fears of rocket and feather pump prices - something the UK motorist hoped had gone away for a long while."
Crude oil has risen by around five US dollars a barrel in the past 10 days.