Routes
Longwy–Luxembourg: is the fuel stop worth it?
Drivers on the Longwy to Luxembourg route should compare the current Luxembourg border fuel price, the real detour and the number of litres before leaving the normal road. The stop only works when the cheaper station stays close to the route and the fill volume is large enough.
Decision question
Is the cheaper fuel stop on Longwy to Luxembourg still worth it after the detour?
What Kilomo should compare
- Live price gap between the route countries for E10 / Diesel, not a stale national average.
- Real detour from the Longwy to Luxembourg route, including the extra distance back to the main road.
- Tank size and likely waiting time, because small top-ups rarely justify a border detour.
Longwy–Luxembourg: where to fill up without a useless detour
From Longwy, Luxembourg is close enough that many drivers assume filling across the border is always the best choice. Often it is, especially for commuters. But the real question is not only whether Luxembourg fuel is cheaper.
The real question is: does the fuel stop fit your actual route?
For a cross-border worker already driving into Luxembourg, the stop is usually profitable. For someone leaving Longwy only to refuel, the calculation depends on tank volume, price gap and detour distance.
Why Longwy is a strong starting point
Longwy, Mont-Saint-Martin, Herserange and Réhon are close enough to the Luxembourg border for a price gap to become a real saving. Luxembourg’s national fuel price cap keeps pump prices more stable than in France.
Still, a cheaper country does not automatically mean a better stop. A station that adds 15 minutes and several kilometres can turn a good price into a weak decision.
Simple example
Assume a 50 L fill, Luxembourg is 10 c/L cheaper, the detour is 5 km and the car uses 7 L/100 km.
The gross saving is €5. The detour fuel cost is roughly €0.60. The net saving is about €4.40.
For a full tank, that is useful. For 20 L, the same gap is only €2 gross, so the detour must be very short.
When it works
- You already cross into Luxembourg.
- You work in Luxembourg or drive there regularly.
- You fill most of the tank.
- The detour stays under roughly 3–5 km.
- You avoid peak queue times.
When to avoid the detour
- You only add 10–20 L.
- The current price gap is small.
- The route crosses a busy area.
- You are short on time.
- There may be a long queue at the station.
FAQ
Is fuel always cheaper in Luxembourg than France?
Often, but the gap changes. Check the current comparison before driving.
Is filling in Luxembourg worth it from Longwy?
For regular commuters, often yes. For a one-off trip, it depends on the amount you fill and the real detour.
How much can I save?
With 50 L and a 10 c/L gap, the gross saving is €5. At 15 c/L, it is €7.50.
Can Kilomo calculate Longwy–Luxembourg?
Yes. Kilomo compares price, route and detour for your trip.