Petrol prices are rising by £ 160 a year because Chancellor Philip Hammond has suggested that an eight-year freeze on excise duties could stop.
There is also the fear that the megafusion of Asda and Sainsbury could increase fuel costs even further.
Fuel prices have risen to the highest level since 2014, while the prices have risen for the tenth week in a row this week.
The average price of petrol now stands at 131.3 p liters, while diesel costs 134.2 p, according to PetrolPrices.com.
But prices could rise even further, as the Chancellor has said that keeping the fuel tax for the rest of Parliament would cost the government £ 38 billion.
The freeze, which was fueled by the Sun's Keep It Down campaign in 2011, showed that fuel costs for both gasoline and diesel remain at 57.95 pence per liter.
Three ways to lower your fuel costs
HERE are three ways to reduce your fuel costs:
- Make your car more economical. You can do this by keeping your tires inflated, taking off the roof rack, emptying your car and turning off your air conditioning when you drive at lower speeds.
- Find the cheapest fuel prices. Use PetrolPrices.com. All you have to do is enter your zip code and indicate how far you want to travel (up to 20 miles).
- More efficient driving. A number of ways to do this include:
- Accelerate gradually without over-revving
- Always drive at the highest possible gear
- If you can, let your car slow down naturally, because your brake is a money burner
- Restarting your car is expensive, if you can, keep moving
The Chancellor said in last year's budget that the continued freeze would save motorists £ 160 a year.
But this week, Mr Hammond said in the Commons that freezing the government "costs twice as much as we spend every year on all NHS nurses and doctors".
Driving groups reacted furiously and said that ending the price lock would hit families and businesses hard.
The AA stormed: "With all other increases in household expenses, such as inflation, mortgage payments, domestic energy bills, an increase in fuel tax could be the straw that breaks the back of the camel for many drivers."
Campaigners said that only an increase of 2 p in the next budget would add £ 50 a year to the fuel costs of a two-head system.
Howard Cox, co-founder of Fair Fuel, added: "The Chancellor has no contact, he says the government has lost £ 46 billion in revenue because of the freezing of rights.
"What would the economy deliver with pump prices of £ 1.60 per liter."
The remarks come as a megafusion between Sainsbury and Asda is questioned about the fear that it can also send gasoline prices sky high.
The Sun can show that the Competition and Markets Authority (CMA) has agreed to investigate whether the £ 15billion tie-up could lead to the closing of the forecourt.
Sainsbury & # ss and Asda would be the largest petrol supplier in the country with a market share of 18 percent – larger than Tesco, BP or Shell.
Tory MP Rob Halfon warned last month that the deal could lead to the end of the price wars and begged the CMA to study if motorists would miss out.
In a reply from the Sun, the chairman of the CMA, Andrew Tyrie, has assured that his officials will ensure that the campaigners' concerns are "taken into consideration".
He said: "Our duty to promote competition for the benefit of the consumer extends across all markets in the UK.
"Our investigation into the proposed merger will therefore cover all products and services in which the parties compete, including the supply of fuel."
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Last night Mr. Halfon said: "Every way drivers drive is hammered with higher costs.
"It is vital that the merger of Asda-Sainsbury does not lead to more misery for drivers.
"That is why I wrote the CMA and I very much welcome the research to ensure that prices at the pump remain low."
View our best tips on how to lower your fuel bill.
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