B10 in a square
Diesel containing up to 10% biodiesel (FAME). On a vehicle, a B10 square means it can use diesel with up to 10% biodiesel.
What to do
Fill from a B10 nozzle only if your filler-flap label or manual shows B10. A vehicle labelled only B7 is labelled for diesel with up to 7% biodiesel, which B10 diesel can exceed.
- What it looks like
- The letters B10 in bold inside a square, black on white.
- Where you find it
- On the nozzle and dispenser of a pump that sells it; next to the filler cap or flap of a vehicle labelled for it; in the owner's manual.
- Kind
- diesel-type fuel
- Set by
- EN 16942:2016+A1:2021, identifier for diesel-type fuels (a square), required by Directive 2014/94/EU Article 7; in the UK, SI 2019/421 Schedule 1, Part 2
Can my car use it?
“The information inside the shape indicates the maximum biofuel content in the fuel that is recommended for use by the vehicle that is equipped with the new label.”
“Vehicle manufacturers do not recommend fitting the labels to older vehicles. Please contact your local dealer if you need advice on which fuel is recommended for use in your vehicle.”
Check your vehicle's manual or the label inside the filler flap. We do not say which makes or models can use this fuel.
Official guidance:
In detail
- The Commission names B10 beside B7 and XTL as the diesel-type examples; CEN lists it among the EN 16942 diesel identifiers.
- The operators' guide: 'B10' means the vehicle can use diesel containing up to 10% bio-diesel. By the same 'up to' wording, diesel whose label shows a lower number (B7) stays within that limit.
- Diesel-type fuel quality is set by EN 590, EN 16734, EN 16709 or EN 14214, according to CEN's page; the identifier itself only states the maximum FAME share.
What it does not mean
B10 is not 'better diesel' for every car, and it does not mean exactly 10% biodiesel: 10 is the maximum.
Labels that go with it
Sources
Each document was fetched and read on the date shown; the clause or section is the one that sets or explains this label.
- UK Government (legislation.gov.uk): The Alternative Fuel Labelling and Greenhouse Gas Emissions (Miscellaneous Amendments) Regulations 2019 (SI 2019/421) — Schedule 1, Part 2, paragraph 2(f): 'BX' where X is the maximum FAME content in volume percentage Checked 2026-09-29.
- ACEA, ACEM, ECFD, FuelsEurope and UPEI: Fuel labelling for road vehicles: information for operators (PDF) — What is the actual meaning of the label?: 'B10' means the vehicle can use diesel containing up to 10% bio-diesel Checked 2026-09-29.
- European Commission: New EU fuel marking: questions and answers (MEMO/18/6102) — question 3, 'What do the new labels look like?': diesel-type fuels: square, B7, B10, XTL, etc. Checked 2026-09-29.
- CEN-CENELEC: European Labels: Fuel — Diesel-type fuels (EN 16942 identifiers B7, B10, B20, B30, B100): quality laid down in EN 590, EN 16734, EN 16709 or EN 14214 Checked 2026-09-29.