How to Tell If a Nearby UK Fuel Price Is Competitive

A nearby petrol or diesel price is competitive only when it is low for the same fuel and the saving is greater than any extra cost of reaching the station. Use the UK Government fuel finder to check local forecourts, then compare the result with the Competition and Markets Authority’s road fuel price statistics for context. National averages are a guide, not a promise of what any one station charges.

Where to check UK petrol and diesel prices

Start with the UK Government fuel finder, which helps drivers find prices at nearby petrol stations. Check the station’s location and the fuel type listed, and make sure the price is still current when you plan to fill up. A listing can help you shortlist stations, but the price displayed at the pump is the one to confirm before buying.

For wider context, consult the Department for Energy Security and Net Zero’s road fuel price statistics. The collection provides UK road fuel price statistics and associated releases. These figures help show the broader price picture, but a national average cannot tell you the exact price at a particular forecourt or whether it is convenient to reach.

Treat the two tools as complementary: the fuel finder can help identify nearby options, while the statistics provide a broader benchmark. The benchmark is most useful for context; it is not a substitute for checking a local price. Prices may change, so confirm the displayed price at the station before relying on a small difference.

Compare the same fuel at nearby stations

Make a like-for-like comparison. Check petrol against petrol and diesel against diesel; do not compare one fuel type with another or assume that a grade with a similar name is equivalent. If your vehicle requires a particular grade, compare only stations selling that grade. Otherwise, a lower figure may not represent a price you can use for your fill-up.

For each realistic option, note the pump price per litre, the distance from your route, and whether you would make a special trip. A station that looks cheaper on a map may cost more to reach, especially if the journey involves driving out and back. Compare the extra distance you would actually travel, rather than the distance between the two station pins.

A quick checklist can keep the comparison fair:

• Check the same fuel type and, where relevant, the same grade.
• Compare prices per litre, not just the total shown for different fill amounts.
• Use the distance you would actually drive, including a return leg for a detour.
• Recheck the price before setting off if the saving is small.

Work out whether a detour is worth it

Estimate the fuel used by the extra driving, then compare its cost with the saving on the amount you expect to buy. You do not need a precise calculation to rule out a marginal saving: a modest price difference can disappear quickly over a long detour. The key is to compare the saving for your planned fill with the cost of the added journey, not to judge by the per-litre price alone.

For example, suppose a nearby station is 2 pence per litre cheaper and you plan to buy 40 litres. The maximum saving at the pump is 80 pence: £0.02 × 40. If reaching it adds a 10-mile round trip, the detour is worthwhile only if the fuel used for those extra miles costs less than 80 pence. If the detour burns more fuel than that, you spend more overall despite the lower displayed price.

The example is a break-even check, not a claim about what any particular car will use. The same method works with any prices and fill amount: multiply the per-litre difference by the litres you expect to buy, then compare that saving with the estimated cost of the extra journey. Include the return distance and remember that traffic, driving conditions and your vehicle affect how much fuel the detour uses. If the result is close, a small change in the local price or journey conditions could erase the saving.

Use the national average as context, not a target

A national average can help you understand whether local prices look high or low in a wider context. It does not guarantee that a station near you will match that figure, and it may not reflect the specific fuel grade or location you need. No current national price is needed to make the local decision, and a broad figure should not be treated as a quote for an individual forecourt.

For a practical fill-up decision, give more weight to a current, like-for-like price at a station you can reach conveniently. Use the published statistics as a benchmark, check the local listing and confirm the station’s displayed pump price. Then compare the saving on the litres you expect to buy with the fuel cost of any extra distance before deciding whether the detour pays.

Source: UK Government, Department for Energy Security and Net Zero