Diesel rose for the fourth month in a row in October, going up 0.59p from 120.21p to 120.80p a litre, according to RAC Fuel Watch data.

The cost of petrol fell ending three consecutive months of increases, with a litre of unleaded went down from 118.84p at the beginning of the month to 118.17p by the close – a fall of 0.67p.

However, that fall for petrol looks likely to be short lived as price rises are looming large due to the oil price going above $60 a barrel for the first time in more than two years (July 2 2015).

A barrel of oil saw a 9% increase finishing the month $5 higher at $60.98. Even though sterling remained comparatively strong against the dollar averaging $1.32 in October it is unlikely to be enough to prevent some pump price rises due to the rising cost of oil.

RAC fuel spokesman Simon Williams said: “At the start of October there was a 6p saving in the wholesale price of unleaded which retailers eventually passed on to motorists in pump price reductions. This month, however, the situation is reversed and the petrol wholesale price has gone up by 4p.

“Inevitably, this increase will be passed on to motorists on the forecourt far more quickly than the cuts were made last month, but that is unfortunately the nature of ‘big’ fuel retailing: pass on wholesale rises quickly and cling on to savings for as long as possible.

“Motorists may yet be spared from large pump prices if the United States takes advantage of the higher oil price to bring more fracking rigs online as this will bring more product on to the market, no doubt easing the barrel price.

“The US is already exporting two million barrels a day when not so long ago it was a nett importer of oil. OPEC, the Organization of the Petroleum Exporting Countries, is unlikely to welcome this as it is doing its best to limit supply to make the oil price go up.

“Unfortunately for motorists, a return to the OPEC oversupply strategy that caused the low pump prices of early 2016 doesn’t seem likely.

“Eyes will also switch to the Chancellor who delivers his Budget this month, and with higher wholesale costs filtering down to the forecourts, the last thing they’ll want to see is an increase in fuel duty. We urge the Chancellor to resist this and leave the rate unchanged.”

The average price of a litre of unleaded at the UK’s four biggest supermarkets is 114.81p – 1p less than it was at the start of October, while diesel is nearly a penny more expensive, going up from 116.82p to 117.72p.

Filling up a 55-litre family car with petrol at the national average price of 118.17p now costs £64.99. The diesel equivalent is £66.44.

Regional fuel price variation

Wales saw the largest drop in the price of unleaded in October with a litre coming down by a penny to 117.62p. Northern Ireland saw the smallest increase, at the same time keeping its title as the cheapest place to buy petrol with a litre costing only 117.41p on average. The South East was once again the most expensive at 118.65p a litre at the end of October.

For diesel Scotland suffered the greatest increase at 1.03p taking an average litre to 121.27p. It was only slightly cheaper than the South East which had the dearest diesel at 121.39p. Northern Ireland had the cheapest at 119.62p.

Regional average unleaded pump prices

Unleaded	02/10/2017	31/10/2017	Change
Wales	118.61	117.62	-0.99
North East	118.46	117.48	-0.98
South East	119.48	118.65	-0.83
West Midlands	118.84	118.01	-0.83
South West	119.02	118.28	-0.74
Yorkshire And The Humber	118.57	117.83	-0.74
East Midlands	118.80	118.10	-0.70
East	119.00	118.37	-0.63
North West	118.63	118.13	-0.50
Scotland	118.50	118.06	-0.44
London	118.85	118.48	-0.37
Northern Ireland	117.53	117.41	-0.12

Regional average diesel pump prices 

Diesel	02/10/2017	31/10/2017	Change
Scotland	120.24	121.27	1.03
London	120.37	121.23	0.86
East Midlands	120.03	120.74	0.71
South East	120.72	121.39	0.67
Yorkshire And The Humber	119.73	120.39	0.66
East	120.53	121.08	0.55
South West	120.39	120.89	0.50
North East	119.80	120.24	0.44
Wales	120.04	120.47	0.43
Northern Ireland	119.22	119.62	0.40
North West	120.19	120.56	0.37
West Midlands	120.08	120.42	0.34