Fuel Types & Quality
Supermarket Fuel
Which petrol station has the best fuel?
CheckFuelPrices Editorial
Expert Written • 4 industry sources
Every petrol station in the UK sells fuel that meets the same legally required British Standard, so no single station has categorically 'better' fuel. The real difference lies in the additive packages added on top of that base fuel — and for most drivers, those differences have little practical effect.
All UK Fuel Starts from the Same Standard
Legally mandated quality floor:
All petrol and diesel sold in the UK must comply with British and European standards — BS EN 228 for petrol and BS EN 590 for diesel — regardless of which brand is on the forecourt sign.
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Shared supply chains:
Fuel from different brands, including supermarkets, frequently originates from the same refineries and is transported through shared pipelines. The brand on the pump does not always indicate a different source.
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E10 is the standard petrol grade:
Standard unleaded across all UK stations is now E10 (up to 10% bioethanol), which replaced E5 in 2021. This applies equally to supermarkets and branded stations.
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Where Branded Stations Differ
Higher additive concentrations:
Branded stations such as Shell, BP, and Esso add proprietary detergent and cleaning additive packages above the minimum legal requirement, which they claim reduce engine deposits over time.
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Premium grades as an upgrade:
Products like Shell V-Power and BP Ultimate are higher-octane fuels with more advanced additive packages, designed for performance or high-compression engines rather than everyday cars.
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Marginal gains for typical drivers:
For a standard car driven normally, the real-world performance difference between branded additives and supermarket fuel is negligible. Independent tests have not consistently shown measurable engine benefits for average drivers.
Supermarket Fuel: Safe and Significantly Cheaper
Meets the legal minimum additives requirement:
Supermarket fuel includes an additive package, just at the minimum required level rather than the enhanced concentrations used by branded stations.
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Typically 3–8p per litre cheaper:
Supermarkets use fuel as a footfall driver, which consistently makes them among the cheapest forecourts in any given area. That saving adds up significantly over a year of driving.
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How to Choose the Right Station for You
High-performance engines:
If you drive a turbocharged or high-performance car and want maximum engine cleanliness over time, a branded station's premium grade may offer a marginal benefit worth considering.
Everyday driving:
For the vast majority of UK drivers with standard petrol or diesel cars, any station meeting the legal standard is perfectly adequate — making price the most logical deciding factor.
Find the cheapest near you:
CheckFuelPrices shows live prices from 4,000+ UK stations updated every 30 minutes, so you can instantly compare supermarkets and branded stations in your area.
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Sources
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