France runs the most radical fuel-price transparency regime in Europe: every station selling more than 500 cubic metres a year is legally required to declare its prices to the government portal Prix-carburants.gouv.fr, and the entire dataset is open. Anyone can download it. National broadcaster franceinfo built a daily-updated, station-by-station price map from it; Petromap ingests the same feed, which is why our French coverage runs close to 10,000 stations.
That density makes France one of the best places in Europe to observe how a fuel market actually behaves.
The French market, live
As of 20 July 2026, French petrol averages 2.00 €/L and diesel 2.09 €/L, against EU averages of 1.85 €/L and 1.91 €/L. The city picture, recomputed from live data on every page load:
| City | Stations | Gasoline (€/L) | Diesel (€/L) |
|---|---|---|---|
| Marseille | 62 | 2.00 | 2.13 |
| Paris | 44 | 2.10 | 2.23 |
| Toulouse | 32 | 2.02 | 2.16 |
| Nice | 24 | 2.05 | 2.19 |
| Limoges | 23 | 2.00 | 2.08 |
| Lyon | 18 | 2.03 | 2.15 |
| Montpellier | 18 | 2.00 | 2.17 |
| Nantes | 17 | 2.01 | 2.12 |
| Nîmes | 17 | 1.97 | 2.10 |
| Ajaccio | 16 | 1.98 | 2.11 |
Cities ordered by tracked station count; cheapest average per fuel in bold.
Two French peculiarities are worth knowing. First, supermarket chains (E.Leclerc, Carrefour, Intermarché and others) sell a large share of the country's fuel at famously thin margins, which is why French out-of-town prices routinely undercut neighbouring markets even at similar tax levels. Second, the autoroute premium is severe: motorway stations price far above the same brand two kilometres away, a gap that the open data exposes mercilessly.
Why transparency matters
The French lesson is the founding argument for sites like ours: when prices are public and comparable, the spread narrows and drivers stop overpaying by accident. Germany reached a similar conclusion with its Markttransparenzstelle, and the EU publishes weekly averages for every member state. The data exists. What it needs is to be readable, which is what the live map and the France country page are for. If you drive the autoroutes this summer, thirty seconds of comparison before the exit will regularly save you a double-digit sum per tank.