Fuel is one of the biggest controllable costs of any drive, and the price can swing noticeably between stations only a few miles apart. A few minutes of planning before you leave means you fill up where it is genuinely cheapest, not simply wherever you happen to be running low.
Compare cost per distance, not just price per litre
The number on the price sign is only half the story. What actually leaves your bank account depends on how much fuel your car burns to cover the trip, so the more useful figure is cost per distance: roughly, price per litre divided by how many kilometres each litre takes you. A thirsty vehicle magnifies every price difference; an efficient one shrinks it.
This matters most when a cheaper station is off your route. A small saving per litre on a 40-litre fill is a modest sum, and if reaching it means extra driving, some of that saving is spent before you arrive. Thinking in cost per distance keeps the comparison honest and stops a tempting price sign from leading you astray.
Know the price spread on your route
Prices are not random. Motorway service areas and airport stations tend to charge a premium because they are a captive market, while supermarket forecourts and edge-of-town independents are often among the cheapest. Before a longer drive, scan the map along your intended route and note where recent reports cluster low. Choosing the cheaper band over the expensive one is the single biggest lever you have, usually far larger than any loyalty discount.
Official prices versus crowd-reported prices
Fuel prices come from two broad sources, and each has strengths. Official or operator-published figures (the kind some governments require stations to file) are authoritative but can lag reality by a day or more. Crowd-reported prices, added by drivers who just filled up, are often fresher and cover stations no official feed reaches, but any single report can be mistyped or out of date. The practical approach is to treat both as evidence rather than gospel: where several recent reports agree, confidence is high; where one lone figure looks suspiciously low, verify it before you rely on it.
Don't chase savings past the break-even point. Driving ten minutes out of your way to save a couple of cents a litre can cost more in fuel and time than it saves. Compare, but stay on-route.
Check the timestamp: freshness beats a low number
Fuel prices can change from one day to the next, so the age of a figure matters as much as the figure itself. Refuelia shows prices with a timestamp, and where a price has not yet been reported it says so honestly rather than guessing. A price posted this morning is reliable; one from last week is a hint, not a promise. When two stations look similar, weight the fresher report: a slightly higher price confirmed today is safer to plan around than a lower one nobody has confirmed in a while.
Watch the motorway premium and where you get cornered
The most expensive fill-up is the one you make with the tank nearly empty and no choice about where to stop. That is exactly the situation motorway pricing relies on. Planning your stops means you are never forced into a premium forecourt: if you know a cheaper station sits comfortably within your remaining range, top up there instead of pulling into the first services out of nerves. Leaving a sensible buffer in the tank is what gives you the freedom to pick on price rather than on desperation.
Crossing borders: convert the currency and the unit
Comparing prices across a border adds two traps. The first is currency: a pump price only means something once you convert it at a realistic exchange rate, including any card conversion fee. The second is the unit: most of Europe sells fuel by the litre, but some countries and many outside Europe price by the gallon, and a US gallon and an imperial gallon are not the same size. Convert both the money and the measure to a single common basis before you decide a fill-up abroad is cheaper. Taxes differ sharply between neighbouring countries, so a short hop across a frontier genuinely can be worth it. Just make sure the comparison is like for like.
Look past the headline number
- Loyalty and app discounts can beat a lower shelf price elsewhere, so factor in the price you will actually pay.
- Payment method sometimes changes the price. Check what a station accepts and whether cash or card differs.
- Fuel grade. Premium grades cost more, and most cars are designed to run perfectly well on the standard grade.
- Detour cost. Extra distance burns fuel and time; subtract it from any saving before calling a station cheaper.
A quick worked example
Imagine you are about to set off on a two-hour motorway drive with roughly half a tank. The services on your route show a price at the higher end of the local range, while a supermarket station three minutes before your junction shows several recent, consistent reports at the lower end. Because the cheaper stop is on the way and confirmed by fresh data, topping up there is an easy win. Now imagine the only cheaper option is fifteen minutes off the motorway with a single day-old report: here the likely saving is small, the detour is real, and staying on-route is the smarter call. Same principle, opposite decision, driven by distance, freshness and how far you would have to stray.
Report what you paid
Price data is the hardest kind to keep fresh because it changes daily. If you note the price when you fill up, you make the next driver's comparison accurate, and they will do the same for you. A map is only as good as the reports behind it.
Ready to use it? Open the live map to find real stations and chargers near you, check their current status, and add what you see for the next driver.