Petrol Price Fall, The AA says petrol prices have recorded their biggest fall since 2008, taking the average cost to 132.16p a litre.
The motorists’ lobby group said average petrol prices fell 5.49p a litre between mid-September and mid-October, the biggest monthly fall since prices fell 11.5p in November 2008.
The price of diesel has fallen from 142.50p a litre to 139.12p.
The AA said lower wholesale fuel prices had prompted the price drop, but warned that further falls were unlikely.
The organisation says the recent drop in prices means the cost of filling up the tank of a small petrol car has fallen by £2.74, while a larger vehicle, such as a Ford Mondeo, would cost £3.84 less to refuel.
Northern Ireland is the most expensive place for petrol, with an average pump price of £132.9p a litre, and London, the north of England, and Yorkshire and Humberside are the joint cheapest at 131.9p.
Scotland is still the most expensive for diesel at 140.1p a litre, while London is the cheapest at 138.6p.