Routes
Metz–Luxembourg: save 8–15 c/L on your commute
Metz–Luxembourg frontaliers cover 40–65 km each way on the A31. Luxembourg's regulated pump price runs 8–15 c/L cheaper than nearby French stations — on a 10-fill month, that compounds to €40–75 in diesel savings before the year ends.
Decision question
Is the Luxembourg regulated price enough to justify changing where the driver fills on a normal workday?
What Kilomo should compare
- Luxembourg's regulated diesel price sits 8–15 c/L below French market averages — the gap is visible on motorway price boards before the border crossing.
- Stations near the A31/E25 corridor south of Luxembourg City add roughly 2–4 minutes to the normal commute route in light traffic.
- At 10 fills per month: a 10 c/L saving on 50-litre diesel = €50/month; a 15 c/L saving = €75/month — between €600 and €900 over a full working year.
- Luxembourg's regulated supply tends to be more stable during French refinery disruptions or strike weeks, when French border stations can run low or close early.
For frontaliers on the Metz–Luxembourg corridor, the question is not whether Luxembourg fuel is cheaper — it almost always is — but whether the daily price spread justifies changing where you stop on a normal working morning.
Why Luxembourg fuel is regulated lower
Luxembourg operates a national maximum pump price (prix maxima), updated by ministerial decree roughly every one to two weeks. Every service station in the country charges at or below that ceiling — there is no difference between motorway and town stations on this corridor.
France has no equivalent ceiling. French stations price freely. The result: Luxembourg diesel typically runs 8–15 c/L below French market averages, with the gap wider against French motorway services and narrower against French supermarket forecourts.
For the Metz frontalier who fills 50 litres of diesel:
| French reference | Typical gap | 50-litre saving |
|---|---|---|
| French motorway service | 15–20 c/L | €7.50–10.00 |
| French supermarket average | 8–12 c/L | €4.00–6.00 |
These figures are indicative for 2024–2025 market conditions. Check Kilomo's live spread before committing to a stop.
The A31 corridor and station positions
Metz to Luxembourg City is roughly 55–65 km via the A31/E25. Depending on origin point within Metz and destination in Luxembourg, the actual driving distance varies. Key corridor characteristics:
- Most A31 northbound drivers pass within 2–4 km of Luxembourg motorway stations before exiting for their Luxembourg destination
- Peak-hour bottlenecks occur at the Longwy/Soleuvre interchange north of the border — plan for 5–10 extra minutes on this section on Monday mornings and Thursday evenings
- French Esso and Total motorway stations near Thionville and Yutz are the last quick-fill option on the French side, typically priced 10–15 c/L above Luxembourg stations
Practical rule for Metz commuters: if your Luxembourg destination is in the south or west of the city (Strassen, Bertrange, Leudelange), a fill on arrival adds near-zero detour. If your destination is north (Kirchberg, Findel), a pre-arrival fill near the A6 motorway stations saves backtracking.
Monthly and yearly impact
The compound effect is the real case for building Luxembourg into the routine:
| Gap | Fills/month | 50L diesel | Monthly saving | Yearly saving |
|---|---|---|---|---|
| 10 c/L | 8 | €4.00 | €32 | €384 |
| 10 c/L | 12 | €4.00 | €48 | €576 |
| 12 c/L | 10 | €6.00 | €60 | €720 |
| 15 c/L | 10 | €7.50 | €75 | €900 |
| 15 c/L | 12 | €7.50 | €90 | €1,080 |
A frontalier filling 10 times per month at a 12 c/L gap saves €720 per year — without changing their route, just their stop.
When Luxembourg fills don't work on this corridor
A few situations where the default Luxembourg-first rule breaks down:
Friday afternoon queue risk. Motorway stations serving frontalier traffic on the A31 corridor can run 10–15 minute queues on Friday afternoons before long weekends. If your schedule is constrained, the Thionville French station may be faster in practice.
Unusually low French prices. During French supermarket fuel promotions or refinery oversupply periods, the gap between Luxembourg and well-priced French stations can narrow to 3–5 c/L. At that spread, a 40-litre partial fill earns €1.20–2.00 — not worth a specific stop.
Low-fuel emergency. If the warning light is on near Metz, don't try to stretch to Luxembourg. French stations near the Metz A31 are market-priced but fully stocked.
Luxembourg public holidays. Grand-Duchy public holidays are different from French ones — some Luxembourg stations run reduced hours or close. Check before assuming 24/7 availability around national holidays.
E10 on this corridor
The corridor analysis for E10 (petrol) is similar but with a smaller typical gap — usually 5–10 c/L below French market prices rather than 8–15 c/L for diesel. Petrol frontaliers fill less frequently in most cases (longer range per litre) so the monthly saving is typically €25–50 at 10 c/L on 40-litre fills.
For daily diesel commuters, the absolute saving is larger and the case for consistent Luxembourg fills is stronger.