The man ahead of me at the petrol station stood there with his receipt, slowly shaking his head, glaring at the pump as though it had personally offended him. He hadn’t even brimmed the tank - just £20 of fuel - yet the total had raced upwards in seconds. Behind him, a short queue of drivers shuffled and waited, each doing the same quiet maths: “What did that little journey actually cost?”
No one kicked off, but you could feel the irritation hanging in the cold.
The tiny display on the pump will happily show a price per litre and a final total - but it almost never answers the question people actually care about: how expensive is this choice compared with the alternatives for the distance I drive?
From March 12, that pump display is going to start giving a more useful answer.
From 12 March (March 12), petrol station pumps will show a new line that changes how we compare fuels
From March 12, petrol stations will be required to add a new, mandatory piece of information directly at the pump: the estimated price per 100 kilometres for each fuel type. Not only the familiar “£1.89 per litre” that most of us barely register any more, but a figure you can actually compare based on real-world driving distance.
In practice, that means drivers will be able to see - immediately - what it costs to cover the same distance using petrol, diesel, or electricity (where the site offers charging). This is not a token label for administrators; it’s a straightforward yardstick for anyone tired of guessing which option is genuinely cheaper.
Imagine a busy weekday evening on a forecourt. On one side: diesel and petrol pumps. On the other: a small bay with rapid chargers, with a couple of electric cars plugged in.
Up to now, most people have had no realistic way to compare those options on the spot. One product is priced per litre, another per kilowatt-hour, and then you might have a subscription on top - or a loyalty discount to factor in. To do it properly you’d need a calculator, a quiet table, and a bit of patience. And, honestly, almost nobody runs that calculation every day.
With the new rule, you’ll instead see a clear line such as “Estimated cost per 100 km: £9.10”, calculated from standardised consumption data. Same distance, different energy source, and it’s readable in seconds.
The thinking behind the change is simple: give drivers a way through a market that’s become unnecessarily complicated. Fuel choices have expanded - E10 to E85, B7 to premium unleaded - and electric charging can vary wildly in both speed and price.
Public authorities are, in effect, moving the conversation away from litres and kilowatt-hours and towards everyday reality: what does it cost me to do my usual commute there and back? That is the figure that ultimately hits your bank balance at the end of the month.
This new display doesn’t instruct anyone what to buy. It simply hands over a clearer set of tools so you’re not choosing half-blind.
If you normally think in miles, it may help to remember that 100 kilometres is about 62 miles. You don’t need to convert anything to use the label - it’s still a like-for-like comparison - but that rough equivalence can make the number feel more intuitive when you’re judging your own weekly travel.
How to use the new “£/100 km” information without misreading it
Your first instinct on March 12 will probably be curiosity. You pull in, tap your card, lift the nozzle - and there it is: a new line or sticker you’ve never noticed before. Don’t just clock it and ignore it.
Treat the “£/100 km” figure as your main reference point. If your vehicle can run on more than one option (for example, petrol and E85), this line will show - in very concrete terms - what you’re likely to spend for the same journey. It won’t be perfectly tailored to your situation, but it gives you a robust baseline.
It’s much like the energy label on a fridge: once you’ve got used to it, you’ll wonder how you ever managed without it.
That said, there is an easy mistake to make: assuming the number is a personalised bill guaranteed to match your car. It isn’t.
The cost shown per 100 km is built on standardised consumption figures - typically an “average” vehicle using official data. If you drive a heavy SUV, frequently tow, or spend most of your time in stop-start town traffic, your real cost will differ.
The sensible way to use it is as a comparison tool, not a promise. Compare fuels against each other, compare one station against another, compare electric versus combustion - but keep a little mental margin so you don’t feel misled when your next fill-up doesn’t align perfectly.
A transport policy specialist puts it like this: “We’re not trying to forecast each driver’s budget to the penny. The goal is to give everyone a shared language - so you can compare like with like, instead of petrol versus kilowatt-hours.”
Check the “£/100 km” first
This is the quickest way to compare different fuels for the same distance.Look at your own typical consumption next
If your car usually uses more than the notional “average”, add a small buffer in your head.Compare stations along the routes you actually use
Over a month, even a few pence per 100 km can quietly become real money.Don’t overlook electric and alternative fuels
The new label may show that an option you’ve been ignoring is, for your distance, the cheaper one.Take a photo of the label once
It’s handy to review later at home when you’re thinking about commuting patterns or weekend travel.
One extra practical point: where charging is involved, tariffs can include time-based elements, connection fees, or membership pricing. The whole point of the £/100 km display is to reduce that complexity into a single comparable figure - but it’s still worth keeping an eye out for any conditions shown on the charger itself.
A small label that could quietly change our travel habits
One extra number on a pump won’t suddenly make fuel cheap or shorten your commute. Even so, it may gradually rewire our instincts.
When you see the true cost per 100 km every week, the “quick trip” starts to look like a line item in your personal budget. And longer-term decisions - changing to a more efficient car, sharing lifts, or combining driving with public transport - become far more tangible when you can put today’s cost into a simple distance-based figure.
Some drivers will treat the label as a nudge to rethink habits. Others will glance at it and carry on exactly as before, and that’s fine. The point is not to shame anyone; it’s to stop disguising the real cost of mobility behind technical units and hard-to-compare pricing.
It also gives people a new, surprisingly useful way to talk about costs with others. “At my local station it’s £8.50 per 100 km on this fuel - what’s it like near you?” From there you get comparisons, small money-saving tweaks, and sometimes even shared solutions. One quiet line on a screen, and the road becomes a bit less opaque.
| Key point | Detail | Value for the reader |
|---|---|---|
| New mandatory display | Cost per 100 km must appear at the pump from March 12 | Lets you compare fuels and energy types in a concrete way |
| Standardised reference | Based on average consumption and official data | Provides a shared benchmark, even if your own car differs |
| Everyday use | Check the label, then adjust for your own driving habits | Better control over fuel spend and future mobility choices |
FAQ
Question 1: What exactly must petrol stations display from March 12?
They will have to show an estimated cost per 100 km for each fuel or energy type they sell, alongside the usual price per litre or per kWh.Question 2: Will this new information be accurate for my exact car model?
Not exactly. It’s calculated using standardised consumption for an “average” vehicle, so your own cost may be higher or lower depending on vehicle type and driving style.Question 3: Does this apply to all stations, including small rural sites?
Yes, it is intended to apply broadly to fuel retailers, although some very small or specific sites may be given a little extra time to comply depending on national implementation.Question 4: Will it help me decide between petrol, diesel and electric?
Yes. Because the options are expressed in the same unit - £/100 km - you can compare different energy sources on equal terms for the same distance.Question 5: What if the new information still isn’t shown after March 12?
You can ask the operator about the requirement and, if the issue persists, report ongoing non-compliance to the relevant consumer or competition authority in your country.
Comments
No comments yet. Be the first to comment!
Leave a Comment