How Can You Find the Cheapest Petrol Near You?

UK petrol prices swing by as much as 30p per litre between stations in the same town. That's up to £15 difference on a single 50-litre fill-up. The average UK household spends £1,254 per year on petrol and diesel (RAC Foundation, 2025), yet most drivers still pull into the nearest forecourt without checking prices first.

You don't need to drive miles out of your way to pay less. You just need to know where to look and when to fill up. This guide covers exactly how to do that, step by step.

Key Takeaways

• UK fuel prices vary by 15-30p per litre between stations in the same area.
• Supermarkets are usually cheapest, but independent stations sometimes undercut them.
• A free price comparison tool like PetrolPal checks 7,000+ stations updated every 10 minutes.
• Filling up mid-week and avoiding motorway services can save £200-400 per year.
• Setting price alerts means you never overpay because your tank is empty.

Why Do UK Fuel Prices Vary So Much Between Stations?

Pump prices differ by 10-20p per litre even within a single postcode. The RAC reported that the gap between the cheapest and most expensive UK forecourts reached 30p per litre in early 2025 (RAC, 2025). Understanding why helps you spot the best deals.

Wholesale costs are roughly the same for everyone

Every UK retailer buys fuel refined from Brent crude oil, distributed through a shared network of terminals and depots. The wholesale cost per litre is virtually identical whether the buyer is Tesco or Shell. Prices diverge at the retail level.

Retail margins create the real gap

Supermarkets (Tesco, Asda, Sainsbury's, Morrisons) use fuel as a loss leader. Their margins sit at just 1-2p per litre because cheap petrol drives shoppers into the store (Competition and Markets Authority, 2023). Branded stations like Shell and BP charge 5-10p more because fuel is their core business.

Location inflates the price

Motorway service stations charge 15-20p above the local average because drivers have no alternative. The CMA's road fuel market study found motorway prices were consistently the highest in the country (CMA Road Fuel Market Study, 2023). Rural stations with no nearby competitors also tend to charge more.

Timing matters more than you'd think

Wholesale prices move daily, but retailers don't all adjust at the same speed. A station that took a delivery last week might still sell at last week's lower price. This lag creates short windows where one station is noticeably cheaper than its neighbours.

What Is the Fastest Way to Compare Petrol Prices?

Real-time price comparison tools are the fastest method. PetrolPal's fuel finder pulls live data from the UK Government Fuel Finder API across 7,000+ stations, refreshing every 10 minutes. That means you're seeing what stations are actually charging right now, not last week's snapshot.

Here's how to use it in under 30 seconds:

1. Open the fuel finder and allow location access, or type in your postcode.
2. Select your fuel type: unleaded, diesel, or super unleaded.
3. Sort results by price to see the cheapest stations first.
4. Check the distance. A station 2p cheaper but 10 miles away probably isn't worth the trip.

The UK Government mandated that all major fuel retailers submit daily price data from 1 June 2024 (GOV.UK, 2024). This transparency means comparison tools now have near-complete coverage of UK forecourts.

Are Supermarkets Always the Cheapest Place to Buy Fuel?

Supermarkets are the cheapest option around 80% of the time, according to RAC Fuel Watch data (RAC, 2025). Asda typically leads on price, with Tesco, Sainsbury's, and Morrisons within 1-2p. But "usually cheapest" isn't the same as "always cheapest."

Here's when supermarkets aren't the best deal:

• Independent stations near supermarket forecourts sometimes match or undercut them to stay competitive.
• Costco offers some of the lowest prices in the UK, often 5-7p below supermarkets. Membership costs £35 per year (Costco UK, 2025).
• Supermarket prices vary by location. A Tesco in Central London may charge 8-10p more than a Tesco in a smaller town where a competing Asda is nearby.

The CMA's 2023 road fuel study confirmed that competition density is the strongest predictor of low prices (CMA Road Fuel Market Study, 2023). Areas with multiple supermarket forecourts close together tend to have the lowest prices in the country.

You can check which retailers are cheapest in your area right now using the fuel price statistics dashboard.

When Is the Best Day of the Week to Buy Petrol?

Mid-week fill-ups tend to be slightly cheaper. Analysis of UK pump price data shows that Tuesday, Wednesday, and Thursday typically see lower average prices than weekends (RAC, 2025). The pattern isn't dramatic, usually just 1-2p, but it adds up over a year.

Prices tend to rise before bank holidays and school half-terms when retailers know demand will spike. If you can fill up a day or two before these periods, you'll often pay less.

The more reliable strategy is to use price alerts rather than guessing the best day. With a free PetrolPal account, you set a target price and get notified when a station near you drops below it.

How Do Price Alerts Help You Save Money on Fuel?

Price alerts remove the guesswork entirely. Instead of manually checking prices every day, you set your target once and wait for a notification. The average UK driver who switches from "fill up wherever" to "fill up at the cheapest station" saves £200-400 per year (RAC Foundation, 2025).

With a free PetrolPal account, you can:

• Set a target price, for example "notify me when unleaded drops below 130p."
• Monitor specific stations or your whole area.
• Get email alerts the moment prices hit your target.

This works especially well if you have flexibility in when you fill up. Even a two-day window lets you wait for a dip rather than paying a peak price.

Can You Save Money on Fuel During Longer Journeys?

Absolutely. Motorway services charge 15-20p per litre above the local average, according to the CMA (CMA Road Fuel Market Study, 2023). On a 50-litre fill-up, that's £7.50-£10 wasted. A two-minute detour off the motorway to a nearby town almost always finds cheaper fuel.

PetrolPal's route planner automates this. Enter your start point and destination, and it finds the cheapest fuel stops along your route based on your vehicle's tank size and fuel economy.

This is especially valuable for:

• Daily commuters who pass through areas with different pricing.
• Road trips where one motorway services stop can cost £10 more than a station just off the junction.
• Delivery drivers and sales reps who fill up multiple times per week. At three fill-ups weekly, even saving £5 each time means £780 per year.

How Does Saving Your Vehicle Details Improve Results?

A Ford Fiesta averaging 55 MPG needs fuel far less often than a Range Rover at 28 MPG. Entering your vehicle details means PetrolPal's route planner calculates exactly when and where you'll need to stop, based on your real fuel economy rather than a generic estimate.

With the virtual garage (free with any account), you save:

• Tank size, so the tool knows your range.
• Fuel economy (MPG), so route calculations are accurate.
• Fuel type, so prices shown match what you actually need.

Once saved, your vehicle details feed into the route planner and fuel finder automatically. You get personalised recommendations instead of one-size-fits-all results.

What Driving Habits Save the Most Fuel?

Finding cheaper stations is half the equation. Using less fuel in the first place saves even more. The Energy Saving Trust estimates that efficient driving techniques can cut fuel consumption by 10-15% (Energy Saving Trust, 2024).

For a driver spending £1,254 per year on fuel, that's £125-188 saved just by changing how you drive.

The changes with the biggest impact

• Accelerate gently. Harsh acceleration uses up to 60% more fuel than smooth, gradual speed increases.
• Maintain a steady speed. Cruise control on motorways helps. Every 10 mph above 60 adds roughly 10% to fuel consumption (Department for Transport, 2023).
• Check tyre pressures monthly. Under-inflated tyres increase rolling resistance. Even 10 psi below the recommended level can reduce fuel economy by 3-5% (RAC, 2024).
• Remove unnecessary weight. Roof racks, bike carriers, and heavy items in the boot all increase fuel use.
• Turn off the engine when stationary. Idling for more than 30 seconds uses more fuel than restarting.

Quick Checklist: Finding Cheap Fuel Every Time

Here's a simple routine that takes under a minute:

1. Check PetrolPal before you leave. Sort by price, filter by distance.
2. Fill up mid-week when possible. Avoid Fridays and bank holiday weekends.
3. Never use motorway services for fuel. Use the route planner to find cheaper stops just off the motorway.
4. Favour supermarket forecourts as a default, but always verify with live data.
5. Set price alerts so you know when to fill up without checking manually.
6. Keep your tank above a quarter full. This gives you the option to wait for better prices.
7. Drive efficiently. Gentle acceleration and correct tyre pressures save more over time than any comparison tool.

Frequently Asked Questions

Is PetrolPal free to use?

Yes, completely. The fuel finder, route planner, and statistics dashboard are all free. Creating a free account unlocks additional features like price alerts, favourite stations, and the virtual garage. PetrolPal is built by Recurse LTD and uses data from the UK Government Fuel Finder API.

How accurate are the fuel prices shown on PetrolPal?

PetrolPal pulls data from the UK Government's open fuel pricing API, which requires major retailers to submit prices daily. Our data refreshes every 10 minutes. Since June 2024, this covers the vast majority of UK forecourts (GOV.UK, 2024). Prices reflect the latest submission from each station.

How much can I realistically save per year by comparing fuel prices?

It depends on how often you fill up and how far prices vary in your area. The RAC Foundation estimates the average household spends £1,254 per year on fuel (RAC Foundation, 2025). Drivers who consistently fill up at the cheapest available station rather than the nearest one typically save £200-400 per year, based on the 10-20p per litre spread found in most UK towns.

Does it matter what brand of petrol I use?

All fuel sold in the UK meets the same British Standard (BS EN 228 for petrol, BS EN 590 for diesel). The base fuel is identical across brands. Premium fuels from Shell, BP, and Esso contain extra additive packages, but for standard road cars these provide minimal real-world benefit. Read our full breakdown in Supermarket Fuel vs Branded Stations.

Should I switch to an electric vehicle to save on fuel costs?

Home EV charging at off-peak rates costs roughly 3-4p per mile, compared to 15-17p per mile for an average petrol car (Energy Saving Trust, 2024). Public fast charging is more expensive at 14-22p per mile, which is comparable to diesel. The upfront cost of EVs is higher, so the total savings depend on your mileage and charging access. PetrolPal also features an EV charger finder to help you locate charging points.