The useful answer: keep the car efficient, drive smoothly and compare the cheaper station against the extra journey. A low pump price is only a saving when the stop still works for your route, fuel grade and fill size.
1. Make your car easier to move
Your engine uses more fuel when the car has to fight avoidable resistance. The quick wins are simple: keep tyres inflated to the pressure listed in your handbook or door sticker, remove unused roof bars, roof racks and roof boxes, and clear weight you do not need for the journey.
Air conditioning is worth using for comfort, demisting and safety, but it still asks the engine to do extra work. Use it when you need it, then switch back to normal ventilation when the cabin is comfortable.
2. Drive slow and steady where conditions allow
The brake is not literally a money burner, but harsh braking usually means you paid to accelerate and then threw that energy away. Looking further ahead, easing off earlier and accelerating gently can reduce the fuel wasted in stop-start driving.
A steady legal speed also helps. You do not need to crawl or annoy other road users; the aim is to avoid unnecessary speed changes, late braking and sudden acceleration. Smooth driving is usually calmer, safer and cheaper.
- Look ahead and lift off early when traffic is slowing.
- Accelerate smoothly instead of racing back up to speed.
- Use cruise control only where it keeps the car steady and appropriate for the road.
- Combine short errands when possible, because cold engines and repeated starts can use more fuel.
3. Be a smarter bargain hunter with Route & Fuel
Once the car and driving style are sorted, the final saving is at the pump. Use Route & Fuel to search current petrol and diesel prices by postcode, choose the exact fuel grade and check when the station price last changed.
Then look at the whole stop, not just the headline pence per litre. A station that is 5p per litre cheaper saves £2.25 on a 45-litre fill before the detour. If the extra driving uses about 45p of fuel, the useful saving is closer to £1.80 before you consider time and convenience.
When a cheaper station is worth it
A cheaper stop is most likely to be worthwhile when the price gap is clear, you are buying enough litres, the station is near the journey you already planned and the price was updated recently. It is less likely to be worthwhile when the detour is long, traffic is awkward, the price is old or you only need a small top-up.
That is the difference Route & Fuel is built around: find the cheaper fuel, then check whether the cheaper stop still makes sense after the extra driving.
Quick fuel-saving checklist
- Check tyres monthly and before long journeys.
- Remove roof bars, roof boxes and heavy items when you do not need them.
- Use air conditioning sensibly rather than leaving it on by habit.
- Accelerate smoothly and avoid harsh braking.
- Search current local prices before you fill up.
- Check the price change time and check when the price last changed.
- Use Route & Fuel when the cheapest station may involve a detour.
Sources and further reading
- Energy Saving Trust: efficient driving advice
- RAC Foundation: eco-driving and fuel use
- GOV.UK: roof boxes and holiday driving fuel use
- GOV.UK: Fuel Finder for drivers factsheet
Check prices before your next fill-up
Use the website for a quick local price check, then use the app when you want live location, saved vehicles, price alerts, Google Maps directions and fill-up history.