Good fuel planning is invisible: you never think about it because you never run low. The trick is to do the thinking once, before you leave. A few minutes with a map turns a long drive into a series of relaxed, well-timed stops instead of a scramble for the next station when the warning light comes on.
Start with your real-world range
The number on the fuel-gauge display or the manufacturer's brochure is a best case. Your real range depends on how you actually drive: steady motorway cruising, a full car, roof bars, hills, cold weather and air conditioning all cut into it. The most reliable way to learn your true range is to note the distance covered between two brim-full fill-ups over ordinary driving, then treat that as your working figure.
Once you have a realistic full-tank range, don't plan to use all of it. Set a safe range: the distance you're genuinely willing to cover between stations, and build the whole trip around that smaller number. It is the single most useful figure in the plan.
The quarter-tank reserve rule
A simple, forgiving rule keeps you out of trouble: aim to refuel when the tank drops to about a quarter, not when the low-fuel light appears. That reserve is not wasted fuel. It is the buffer that absorbs the things you can't predict.
- A station that turns out to be closed, cash-only, or out of your fuel grade.
- An unexpected diversion, roadworks or a long queue at the pump.
- Heavier traffic, a headwind or a climb that quietly raises consumption.
- Simply misjudging the gap to the next reasonable stop.
Keeping a quarter in the tank also spares the fuel pump, which relies on the fuel around it to stay cool, and it means the low-fuel warning becomes a rare event rather than a normal part of every drive.
Anchor stops to real stations, not round numbers
"Refuel every 300 kilometres" sounds tidy, but distance alone doesn't tell you whether a station will be there. Instead, scan the map along your route and pick specific stations that fall comfortably inside your safe range. Choose ones that are well mapped, recently confirmed, and, where you have the choice, a little cheaper than the roadside premium.
A stop you've selected on purpose beats pulling into whatever appears when the gauge gets low. It lets you favour stations with the amenities you want, the correct fuel or connector, and prices that suit your budget, rather than accepting the first option out of necessity.
Combine stops with breaks. Line up each fuel stop with a meal, coffee, a stretch or a driver swap. A ten-minute fill-up feels like nothing when it's also lunch; it feels like an interruption when it's a separate errand. Pairing the two also builds in the rest that long drives need.
A worked example
Suppose your safe range is roughly 400 kilometres, comfortably less than a full tank, and your route is about 950 kilometres. Two stops are enough on paper, but plan three light ones rather than two tight ones. Set the first at around 300 kilometres, where you'll also eat; the second near 600, timed for coffee and a leg-stretch; and keep a third option identified near 800 in case anything upstream forces a change. You reach each station with fuel to spare, every stop does double duty as a break, and no single leg is long enough to leave you anxious. That is the whole aim: margin at every step.
Plan for the thin stretches
Fuel is not evenly spread. Rural roads, mountain passes, coastal routes and long stretches of motorway between junctions can run a surprising distance with nothing in between, and specialist fuels such as LPG or CNG, or a specific EV connector, thin out faster still. Overnight, many independent stations close, so a route that's easy by day can be sparse at night.
Find these gaps before you set off and top up before you enter them, even if the tank is only half down. Filling early on a quiet leg is free peace of mind; running low in the middle of an empty stretch is exactly the situation the reserve rule exists to prevent.
Motorway versus off-motorway prices
Fuel bought at motorway service areas and near airports tends to carry a premium over stations a short distance away, because the captive, convenience-driven location commands it. On a long trip those differences add up across several fill-ups.
Where the route allows, plan a stop just off the main road, often a junction or two into a nearby town, where prices are usually lower and the forecourt less hectic. Weigh the saving against the time a detour costs; a few minutes for a worthwhile discount is easy, but chasing a distant bargain rarely pays. When you compare prices, check the timestamp: a figure reported today is worth acting on, while a week-old one may no longer hold.
Check the station is open before you commit
The last thing to confirm is the simplest to overlook: that your chosen station is actually open and serving your fuel when you'll arrive. Opening hours vary widely, holidays shorten them, and smaller sites can shut earlier than expected. For each planned stop, glance at its listed hours and most recent status, and always know the next station beyond it. With a backup already identified, a closed forecourt is a minor detour rather than a problem.
- Confirm opening hours against your likely arrival time, not the current time.
- Note the next station past each stop as an automatic plan B.
- As you travel, confirm the status of stations you use: your quick updates help the next driver plan as smoothly as you did.
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.