How many litres you fill up in one visit. Most family cars hold 50–70L, smaller cars 35–45L. This affects how much you save on fuel price alone.
litres
🚗 Fuel economy
Your car's miles per gallon. Check your trip computer or car manual. Most petrol cars average 30–45 MPG. A higher number means driving further costs you less, so it's more likely to be worth going to a cheaper station.
MPG
🟢 Cheap price threshold
Stations at or below this price show as green. You'd fill up here without hesitation. Pre-filled from the cheapest station in your last search.
p/litre
🔴 Expensive price threshold
Stations at or above this price show as red. You'd actively avoid these unless there's no alternative. Pre-filled from the most expensive station in your last search.
p/litre
The app finds your nearest station to the postcode you entered. Every other station then shows whether detouring to get cheaper fuel is worth it — based on how much further it is from your postcode vs the nearest station.
Estimated net saving = fuel saving − cost of extra detour
Distance is measured from your postcode, not your actual route. If the cheaper station happens to be on your way, the real saving will be higher than shown. If it's in the opposite direction, it may be less. Use it as a guide, not an exact figure.
Search for stations to see a worked example using your postcode and real prices.
Stations
Prices via checkfuelprices.co.uk
🪄 Expensive Petroleum
"Expensive Petroleum" — Ron Weasley
Don't drive for cheaper petrol unless it actually saves you money
Most fuel apps show prices. This shows whether it's worth the trip.
We factor in distance, fuel usage and tank size to tell you the real saving — not just the price.
1
Enter your postcode or use GPS
2
See live prices on a map
3
See if the cheaper station is actually worth the detour