THE cheapest petrol stations across the UK have been revealed and choosing the right supermarket could save you 30p a litre.
After a summer of rising petrol prices the average cost for a litre of unleaded went up 0.77% in the last month, according to the RAC.


Asda has the cheapest price per litre on average, according to the RAC[/caption]
The RAC said the increase in price comes despite no real change in the cost of oil.
As of October 1, the average price of petrol in the UK was 135.55p per litre, with motorway services offering 157.64p.
The average price for a litre of unleaded is up from 134.64p on September 1.
Diesel showed similar rises rising from 142.19p at the start of last month to 143.38 on October 1.
To best avoid the hefty price tag when filling the tank, motorists should head to Asda.
RAC Fuel Watch revealed that the supermarket chain had the cheapest fuel compared to rival brands.
The petrol and diesel monitoring initiative found that Asda’s petrol was 124.7p a litre, at its lowest.
On average the grocery giant’s fuel was 131.6p a litre, Sainsbury’s was the next cheapest on average at 132.0p.
Tesco was 132.4p a litre and Morrisons was most expensive at 132.6p.
Motorists should be aware that Asda’s highest fuel price was 138.9p a litre, 1p a litre more than Tesco‘s top price of 137.9p.
Asda also came out on top in the diesel prices with a litre costing 139.3p on average.
Sainsbury’s was a close second cheapest at 139.4p a litre, then Tesco at 139.7p and finally the most expensive was Morrisons at 140.6p a litre.
The cheapest for non-supermarket pumps was found at Essar which was on average 138.9p a litre for diesel and 129.9p for petrol.
Shell had the most expensive across both diesel and petrol at 146.4p and 138.4p a litre respectively.
Research from the RAC showed that filling up at supermarkets is best to avoid breaking the bank as the lowest supermarket price, 124.7p was 5p cheaper than the lowest at Essar at 129.9p.
Across the UK, England had the highest average price for a litre of petrol at 135.3p.
Scotland was 134.5p a litre, Wales 134p and Northern Ireland was 128p per litre.
Drivers can now easily find the cheapest petrol stations in the UK using the myRAC app.
This handy tool tells motorists the best prices as costs can vary dramatically from region to region and can be cheaper in more rural locations.
HERE’s how to save yourself money and fuel
1. Make your car more fuel-efficient. Keep your tyres inflated, remove the roof rack and turn your air-con. This will reduce your engine power and the amount of fuel you’re using
2. Drive slow and steady. The brake is a money burner, so avoid slamming it on. Accelerating slowly will also save you fuel and money.
3. Be a bargain hunter. Find the cheapest petrol or diesel in your area. PetrolPrices.com and Confused.com are free to use – just enter your postcode and how far you want to travel.

Motorists should stick to filling up at supermarkets to get the best prices[/caption]