How Much Does Diesel Cost Per Litre?

Diesel fuel prices in London on a monthly basis from 2017 to 2021 The average fuel price in December 2021 was 149.9 pence per liter. The cost of diesel in London is no exception to the city’s reputation for being pricey.

National and Regional

Highest — At 146.8 pence per litre, the South East has the highest unleaded pricing.

Northern Ireland has the lowest unleaded price, at 142.7 pence per litre.

The South East has the highest diesel price, at 150.3 pence per litre.

The average price of unleaded in supermarkets is now 143.0 pence per litre. The price difference between supermarket pricing and the UK average for unleaded gasoline has widened to 2.7 pence per litre.

Why is diesel so expensive?

The cost of diesel fuel is higher. Diesel fuel is subject to a higher federal excise tax than gasoline (24.4 cents per gallon vs. 18.4 cents per gallon for gasoline), and diesel fuel is occasionally subject to a higher state tax.

What was the average cost of diesel fuel in 2020?

In 2020, the average annual cost of diesel fuel in the United States was 2.55 dollars per gallon. This was a drop from the previous year, when diesel was selling for an average of $3.06 per gallon.

Is diesel cheaper than petrol?

At the pump, petrol is normally a few pennies cheaper than diesel, but diesel engines are generally more efficient than petrol by a significant margin. That implies a diesel model will almost probably be less expensive to maintain, even if you only go a moderate distance. According to experts, if you drive 10,000 miles a year, a supermini-sized car will save you around £250 in fuel expenditures over three years. If you upgrade to a family hatchback like a Ford Focus or a VW Golf, you’ll save around £500. If you choose a medium-sized SUV like the Nissan Qashqai, you might save around £900 on diesel.

Given the pricing differences, it makes the most sense to choose a diesel if you drive much more miles per year than the typical 10k, and especially if you do so in a larger vehicle. If your mileage is typical, the cost of buying and selling evens out, and there’s usually no financial benefit to buying the more expensive diesel.

Why do diesels last longer?

A gas engine would have reached the end of its life 20 years ago at about 100,000 miles, but today’s engines are constantly making another trip around the odometer. However, while gasoline engines can now reach 200,000 miles and beyond, diesel engines can also reach 500,000 miles and beyond. The following are three reasons why diesel engines survive longer than gasoline engines:


We’ve all learned the hard way that larger isn’t necessarily better. Diesel engines, on the other hand, are designed to endure longer than their gasoline equivalents. Compression ratios and cylinder pressures are higher in diesel engines than in gasoline engines. Diesel engines are designed with these factors in mind. Their crankshaft and camshaft are larger, necessitating larger bearings and stronger main and rod bolts. Increased clearance from larger crankshafts and camshafts provides for greater oil flow. Better engine lubrication means reduced engine wear, which extends the engine’s life.

Other significant design features of the diesel engine contribute to its durability, including:

  • Most diesel engines feature a gear-driven construction, which means you won’t have to worry about timing belt issues. This also saves money on costly maintenance because the timing belt does not need to be replaced.
  • Piston cooling jet – Piston cooling jets spray engine oil on the bottom of your pistons in diesel engines. This engine oil spray protects pistons from premature wear by keeping them properly lubricated, which lowers friction and keeps them cool.
  • There are no spark plugs in diesel engines, so the gasoline burns more slowly. Because of the slower burn, there is less stress and more torque, which is essential for diesel engine efficiency.

Diesel Fuel

The fuel that diesel engines burn is another reason they survive longer than gasoline engines. Diesel fuel is a form of distillate fuel made primarily from crude oil, which allows diesel engines to wear their cylinders out more slowly than gasoline engines. This adds diesel fuel lubricating qualities, extending the engine’s total lifespan. On the contrary, gasoline is mostly composed of aromatic hydrocarbons, which function similarly to harsh and corrosive solvents. This lack of lubricity causes your engine’s components to wear out prematurely. Diesel engines have lower exhaust gas temperatures (EGTs), which contributes to their increased lifetime. Despite the fact that diesel fuel has 139,000 British thermal units (BTUs) compared to 115,000 BTUs for gasoline, the principles of thermodynamics dictate that the higher compression ratio diesel engine’s expansion rate actually cools the exhaust gases faster. The first flame front is cooler due to the lower auto-ignition temperature of roughly 410°F for diesel fuel compared to 495°F for gasoline. Diesel engines also have a substantially lower air-to-fuel ratio, ranging from 25:1 to 70:1, compared to 12:1 to 16:1 for gasoline engines. EGTs are cooled by a lower air-to-fuel ratio. In addition, gasoline burns more faster than diesel fuel. Because of the slower laminar speed of the flame during combustion in diesel engines, there is less shock to the rotating assembly, which adds to their durability.

Lower RPMs

The third factor that determines how long a diesel engine lasts is its operating efficiency. In comparison to a gas engine, diesel engines have lower revolutions per minute (RPMs) and produce more torque. The ability to create the same power at lower revolutions implies less wear on your pistons, rings, cylinder walls, bearings, valves, and guides, extending the life of your engine. When diesel engines are not in use for long periods of time, they are usually left running. The regular cycling of turning the engine on and off saves wear compared to a gasoline engine since a major percentage of wear occurs at starting. It also decreases heat cycles and maintains stable operational temperatures.

Expert Spotlight:

PSP Diesel in South Houston, TX, is known for their 6.0L Ford Powerstroke builds, and Stephen Peters has this to say about why diesel engines survive longer:

“Diesel users often use their engines for far more than what they were designed for. In contrast to the conventional start/stop patterns of a gasoline engine, this is typically done to generate maximum torque and run for longer periods of time during the day. They aren’t exposed to abrupt starts and stops. One of the most abrasive actions on a motor is starting it. While idling your engine is not good for its longevity, that is exactly what the majority of these trucks are doing. They run long hours and are worked very hard because they are started at the beginning of the day and shut off at the end, but that is their job.”

Peters continues, “Diesel engines are simply intended to be more durable. For example, the blocks are larger, the walls are thicker, and the pistons are larger. And, even with the extra weight, let alone the tight tolerances in the rings to avoid blow-by, the design was created with lubrication in mind, reducing friction and damage to the rubbing parts.”

What kind of fuel is diesel?

The distillate fuel oil sold for use in motor vehicles that use the compression ignition engine named after its inventor, German engineer Rudolf Diesel, is known as diesel fuel. In 1892, he received a patent for his original design. Diesel fuel is made from a combination of crude oil and biomass resources.

Is diesel expensive in Australia?

Remember that getting petrol in these isolated regions in the outback is not easy! Unleaded fuel will cost up to $2 Australian Dollars per litre in rural areas. Unleaded gasoline is currently priced at around $1.40 per litre in urban and coastal locations. In Australia, diesel is more expensive than petrol; the current price per litre is roughly $1.55 Australian Dollars.

Travelwheels tip 3 – go shopping at supermarket!

Another suggestion from Travelwheels campervan hiring is to go grocery shopping! When you buy groceries at Coles or Woolworths, you’ll get a discount coupon at the bottom of the receipt, which you can use to save even more money on fuel or petrol.

These vouchers are available at every supermarket chain, allowing you to save up to 10c per Litre! Keep in mind that Australia is a large country, and you can easily drive 20,000 kilometers! If you save 10c per litre, that’s a significant amount of money!

Why is diesel expensive in Australia?

Just feeling how greasy diesel is will convince you that it is less refined than gasoline. So, if diesel is slightly less expensive to produce, why is it more expensive at the gas station than unleaded gasoline?

Diesel was 15 cents per litre more expensive than unleaded at my local servo earlier this month, costing $1.30 per litre.

But, given the recent strength of the dollar, which has reduced the cost of crude oil and diesel imports, shouldn’t fuel prices have fallen even further?

“Diesel users have not been ripped off,” argues Geoff Trotter, general manager of fuel market consultant FUELtrac.

“The drop in Singapore diesel product pricing from the highs of 2008 has very closely followed the reduction in pump prices since then,” he argues, waving graphs that show the correlation.

“Prices in Singapore have risen somewhat this month to offset the stronger dollar.”

Several fuel experts from organizations like as FUELtrac, the Australian Institute of Petroleum, and even the Australian Competition and Consumer Commission concur that Singapore’s massive refineries and trading houses are critical to what happens in Australia.

On a global basis, our refineries are insignificant, unable to supply Australia’s ever-increasing demand for diesel, which is imported to the tune of 40%, largely from Singapore.

However, because of the generally accepted policy of import-parity pricing, even if Australian refiners could produce plenty of cheap diesel, it would still have to be sold at Singapore rates.

When we sell petroleum products to New Zealand and the Pacific Islands, for example, we gain from the policy.

Diesel is in high demand in Asia, particularly for power generation in China and India’s rapidly rising economies.

As a result, we’re in a diesel competition with Asia. In Singapore, the comparatively pure fuel that is required in Australia is considerably more limited.

For diesel pricing, the tight supply-and-demand scenario is significantly more essential than the cost of production.

Trotter has a simple explanation for why diesel prices have returned to 2007 levels around the world. “The global financial crisis put a stop to demand in North America and Europe,” he claims.

Furthermore, because the last two winters in the United States have been relatively mild, there has been less demand for heating oil, resulting in more distillate being available to serve the Asia-Pacific region.

There are a few more elements that contribute to the fact that diesel is not as expensive as it appears.

To begin with, most diesel in Australia is sold in bulk to large users such as mines, farms, and trucking businesses. According to Trotter, the wholesale “terminal gate price” is often $10 per litre less than the retail roadhouse price.

Even if they don’t have their own tanks, most large trucking companies have card accounts with the fuel providers, allowing them to get roadhouse diesel for around $5 less than what you see on the price board.

And, because diesel truck owners are businesses, they may claim back around 20 cents per litre on the roughly 50 cents per litre in government taxes.

In and of itself, the tax is low by international standards. That’s why, behind Canada, New Zealand, the United States, and Mexico, Australia has the world’s fifth-cheapest diesel.

When reading a recent ACCC study, one almost feels sorry for the Australian petroleum firms, as the average profit margin on diesel across the refining, wholesale, and retail sectors has been just $6 per litre over the past seven years.

Why do Asda charge 1 for fuel?

When it comes to buying gas, motorists who use the pay-at-pump system will soon notice a significant difference.

Some fuel stations in the UK have started charging a £99 ‘deposit’ before drivers can use a credit or debit card to top up their tanks.

That’s a big change from the current ‘pre-authorization check’ procedure, in which your card issuer is only asked for £1 before the full payment for the fuel is taken one to three days later.

And this new ‘ringfencing’ strategy has already made headlines, confusing and alarming some car owners.

So we thought we’d explain what it all means – and how it might affect you.

What is a ‘pre-authorisation check’?

A ‘pre-authorisation check’ is not a fee and will not result in the full ringfenced amount being charged to your account.

Instead, your bank or credit card company will simply hold that amount until the exact amount is debited.

If you buy £50 in petrol, £99 is ringfenced until the full amount is paid, after which the remaining £49 is refunded to you.

Why is it changing?

It was implemented by Visa, Mastercard, and American Express to combat fuel theft and ensure that consumers had enough money to fill up their cars before driving away.

It’s also supposed to be a means for cardholders to keep a better track on their finances and everyday expenditures.

Which supermarkets are changing it?

The new costs will be implemented by all major supermarkets in the coming months, while Sainsbury’s has already implemented the new system at certain of its Welsh stores, with a ringfenced amount of £100 on each pay-at-pump transaction.

Tesco and Asda are thought to be testing it in a few locations in England right now.

So why might this be a problem?

It shouldn’t be if done right; it should be straightened up in about an hour, and your statement should only display the precise quantity of fuel purchased.

However, a Mastercard spokeswoman said that the hold payment might appear on items like banking apps for a short time, and that anyone having problems with the new setup should contact their lender.

In addition, if a separate transaction for the actual fuel amount is attempted despite an authorisation hold being imposed, it may result in delays in the appropriate cash being returned to people’s accounts.

And don’t forget that millions of people in the UK only have basic bank accounts with no overdraft, which do not allow for pre-authorization fees.