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How we compare fuel prices

A useful comparison needs the right fuel, a dated price and a journey you can actually make. Here is what our figures mean, where their limits lie and how to use them.

Methodology reviewed: . Price dates appear on the price pages themselves.

Sources and coverage by country

We organise published reports into local searches, comparable fuel grades and dated summaries. We do not independently visit every station or certify pump prices. The original publisher controls the source report; the forecourt price takes precedence when you buy.

United Kingdom

Government Fuel Finder

Station reports in pence per litre. We check the UK feed every 15 minutes, but each retailer price has its own reporting time. National daily snapshots and a local search can therefore describe different moments.

Spain

MITECO fuel-price service

Reported station prices from the Ministry for the Ecological Transition and the Demographic Challenge. Petrol and diesel are in euros per litre. Compare the same fuel grade and check each station’s date; our import frequency does not set the retailer’s price.

India

Public city-price publishers

City reference rates rather than a complete station survey. The import pipeline uses Petroldieselprice, with BankBazaar and Fuelprice.co.in as fallback publishers when coverage is unavailable. A single listed oil company cannot establish the cheapest retailer in a city. Some city rates use a named parent-district reference.

Australia

State government price feeds

Station prices in cents per litre where supported. Coverage includes Western Australia’s FuelWatch and New South Wales FuelCheck data; it is not a national survey of every station or fuel grade. Check the state coverage and price date before planning a journey.

France

prix-carburants.gouv.fr open data

Reported mainland station prices in euros per litre. The feed date and the date of an individual price are distinct. Offers flagged as unavailable are excluded from comparisons; inclusion is not a guarantee of stock when you arrive.

Italy

MIMIT — Osservaprezzi carburanti

Available reported MIMIT offers, keeping self-service and attended (servito) prices separate. Each offer retains its report, effective and check dates where supplied. A check of an unchanged price does not make it a newly reported price. Gas and liquid fuels must be compared in their stated units.

Portugal

Direção-Geral de Energia e Geologia (DGEG)

Operator-reported prices for continental Portugal, with the price-update date and time. This coverage does not establish prices in Madeira or the Azores. Products may be priced per litre, kilogram or cubic metre: compare matching units.

Additional India fallback references: BankBazaar and Fuelprice.co.in. NSW source: FuelCheck. These publishers are sources, not endorsements of our service.

Three dates that answer different questions

  • Price report or effective date: when the source says the price was reported or took effect. Use this to judge the age of the offer.
  • Source or retrieval date: when a feed was published or our service collected it. A fresh download can contain an older price.
  • Snapshot date: the day represented by an average or chart point. It is not a prediction of today’s lowest pump price.

An old report can be an unchanged price or a missed update. A timestamp alone cannot tell which. If a displayed date is missing, do not assume the price was checked today.

What “cheapest”, “nearest” and an average mean

A cheapest result is the lowest listed offer for the selected fuel within the returned search results and filters. It is not a claim about every station in the country. Nearby searches can cross a city boundary; missing reports can leave otherwise suitable stations out.

Nearest uses the distance from the search point to the station coordinates. Displayed distances are straight-line estimates, not a driving route. Rivers, restricted roads, tolls and access to the opposite carriageway can change the actual trip.

Our UK daily and location averages summarise available station reports for each grade. They are not weighted by litres sold, and their reporting counts can change. A change in an average can reflect changes in which stations reported as well as changes in prices. Compare equivalent grades, dates, service modes and units before interpreting a gap.

On India pages, listed provider rates are city references. We do not award a comparison winner from one provider, equal rates or mismatched effective dates.

Inspect the dated UK seven-day table and downloadable CSV

Worked example: a cheaper pump can be a costly detour

These are illustrative inputs, not current station prices. Suppose you plan to buy 50 litres and a station is 4p per litre cheaper, but reaching it adds 10 miles to your round trip. Your car achieves 40 UK mpg and the fuel used on the detour costs £1.50 per litre.

Gross pump saving
50 litres × £0.04 = £2.00
Extra fuel used
10 miles ÷ 40 mpg × 4.54609 litres per UK gallon ≈ 1.14 litres
Fuel cost of the detour
1.1365 litres × £1.50 ≈ £1.70
Saving after extra fuel
£2.00 − £1.70 ≈ £0.30, before time, tolls and vehicle wear

With a 20-litre top-up, the same 4p gap saves only 80p at the pump, less than the detour’s fuel cost. Use the extra distance over your normal route, not the entire distance from home.

Calculate a saving using your own inputs

Editorial choices, funding and corrections

Our guides explain how to interpret fuel data and make a purchasing decision. Numerical examples are labelled as examples; a historical figure or a budget scenario is not a current quote or a forecast. We link to primary sources for policy and technical claims where available. A revision date refers to the content, not a promise that every external fact changes on that date.

The service is free to use. Advertising or clearly marked affiliate links may help fund it. Price ordering uses the reported price and selected filters; an advertisement is separate from a station result. A commission does not make a retailer the cheapest.

To report an error, send the page URL, country, fuel grade, displayed value and date, and what needs correcting to hello@cheapestfuelfinder.com. We can fix our display and calculations; source-price errors may require an update from the publisher. See the corrections contact page for details.