Where Combusto's Fuel Prices Come From and How Fresh They Are

Before you drive across town to save a few cents, it helps to know where the prices on Combusto come from and how much you can trust them. This short guide explains it.

A note on the interface: Combusto is currently in Spanish. Labels are shown as they appear on screen, followed by their English meaning in parentheses.

Where the prices come from

Combusto doesn't make up or estimate any price. Every price comes from the official data published by Spain's Ministry for the Ecological Transition and the Demographic Challenge (Ministerio para la Transición Ecológica y el Reto Demográfico), which covers the petrol stations of Spain. Stations report their own prices to the Ministry, and Combusto shows them as they are published.

The source is written at the bottom of every page:

How often the prices are updated

Combusto downloads the latest data every hour. Your browser then fetches the current prices when you open a page, so you don't have to reload the site to get the latest ones.

How to tell how recent a price is

Look for Actualizado hace… (Updated … ago) on the page:

• On a town or province page, it says how long ago the price shown at the top, the cheapest one, was updated.
• On the home page, in the lists of stations near you and in your saved towns, it says how long ago the most recent price in that list was updated.
• The time is shown as un momento (a moment), a number of min (minutes) or a number of h (hours).

How to read a price

• Prices are in euros per litre and have three decimals, for example 1,829. Spain writes the decimal separator as a comma.
• Combusto covers four fuels: Gasóleo A (standard diesel), Gasolina 95, Gasolina 98 and GLP (LPG).
• A station only appears in a list if it publishes a price for the fuel you selected. If a station you know is missing, it may not sell that fuel.
• When several stations have exactly the same price, all of them are highlighted as más barata (cheapest), and the top of a town page tells you how many share the price.

Why the price at the pump may be different

The footer says it clearly: the price may not match the one at the pump when you fill up (El precio puede no coincidir con el del surtidor en el momento de repostar). A station can change its price between two updates, and the data depends on what each station reports. Treat Combusto as a very good guide for comparing stations, and check the price on the pump before you fill the tank.

Stations with a wrong location

A small number of stations have incorrect coordinates in the official data. Combusto still lists them on their town page with their price, but without a distance or a Cómo llegar (Get directions) link, so it never sends you to the wrong place.

Spotted a mistake?

If you find a wrong price, a missing station or anything else that looks off, use the Informar de un error (Report a problem) link in the footer of any page. It takes you to a form where you can describe what you found.

Good to know

• Combusto is a project by Studio Apps. The version you are using is shown at the bottom of the page.
• You don't need an account, and Combusto only uses your location in your browser, and only if you choose to share it.