National foreword

This British Standard is the UK implementation of EN 228:2025. It supersedes BS EN 228:2012+A1:2017, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee PTI/2, Liquid Fuels.

A list of organizations represented on this committee can be obtained on request to its committee manager.

This British Standard contains the necessary requirements for high‑octane (Super) unleaded petrol.

The UK committee draws users’ attention to National Annexes NA, NB, NC and ND, which provide further guidance to assist users in the application of this standard.

National Annex NA (normative) gives the national sampling requirements for unleaded petrol to comply with Clause 4.

National Annex NB (normative) gives the pump marking requirements for unleaded petrol to comply with Clause 5 and Subclause 6.3.3.

National Annex NC (normative) gives seasonal volatility requirements for unleaded petrol to comply with Subclause 6.5.2.

National Annex ND (normative) gives requirements for the provision of Super grade of unleaded petrol.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2025.

This European Standard was approved by CEN on 9 June 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document (EN 228:2025) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin”, the secretariat of which is held by NEN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2026, and conflicting national standards shall be withdrawn at the latest by January 2026.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 228:2012+A1:2017.

This document was originally prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. In addition to other standards, it is intended to be complementary to the regulatory measures contained in various EU Directives.

The following is a list of significant technical changes between this document and the previous edition:

introduction of the new clause “Terms and definitions”;
update of the normative references towards undated versions where they don't concern requirements originating from European Directives (in line with decisions by CEN/TC 19 in coordination with the European Commission), and updating the effective publication dates where required;
introduction of several updated test methods in the tables. The European Fuels Quality Directive 98/70/EC [1], including its Amendments [2], [3], [4], [5], [6], [7] and [13] refer to test methods in EN 228:2012+A1:2017, with the requirement that updated analytical methods shall be shown to give at least the same accuracy and at least the same precision as the methods they replace;
deletion of the recommendation under 6.1 towards provision of evidence for the biological origin of ethanol as this has now been fully covered by the (revised) EC Renewable Energy Directive;
referencing under 6.4 of EN 16270 as a method for high boiling components in unleaded petrol;
introduction under 6.4 of CEN/TR 17491 for further information on aniline, N-methyl aniline,

N-ethyl aniline, N,N di-methyl aniline and secondary-butyl acetate when used as blending components in unleaded petrol;
correct use of the decimal point for Final Boiling Point (FBP), distillation residue and existent gum content in limits has been implemented to align with test method reporting requirements;
clarification under 6.7.2 on how to address situations in which the test method includes a bias-correction to the dispute method;
introduction of the new EN ISO 4259‑1 and EN ISO 4259‑2 for the precision of measurement methods and results, instead of the withdrawn EN ISO 4259;
introduction of new test method for vapour pressure, EN 13016‑3, and establishing method of dispute as being EN 13016‑1;
introduction of a new micro-distillation test method, EN 17306, and establishing method of dispute as being EN ISO 3405;
change of method of dispute for content of benzene, oxygen and methanol to EN ISO 22854;
introduction of EN 13723 as an additional analysis method for lead content and establishing method of dispute as being EN 237, allowing an eventual change of the referee test method in the near future;
removal of reference to EN 238 and establishing of EN ISO 22854 as referee method for benzene content;
removal of reference to EN 16135 as a method for the determination of manganese content;
inclusion of new GC-VUV test method, EN 18015, for the determination of olefins, aromatics, benzene, oxygen and oxygenates content;
unification of distillation characteristics for E5 and E10 by lowering the E70 minimum values for E10 in Table 3 with 2 % V/V.

The marking at the pump of this product is in line with the requirements of the European Fuels Quality Directive 98/70/EC [1], including its Amendments [2], [3], [4], [5], [6], [7] and [13] and the Alternative Fuels Infrastructure Regulation [14].

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

1 Scope

This document specifies requirements and test methods for marketed and delivered unleaded petrol. It is applicable to unleaded petrol for use in petrol engine vehicles designed to run on unleaded petrol.

This document specifies two types of unleaded petrol:

one type with a maximum oxygen content of 3,7 % (m/m) and a maximum ethanol content of 10,0 % (V/V) in Table 1;
one type in Table 2 with a maximum oxygen content of 2,7 % (m/m) and a maximum ethanol content of 5,0 % (V/V) intended for older vehicles that are not warranted to use unleaded petrol defined in Table 1.

NOTE 1 The two types are based on European Directive requirements [3], [4] and [13].

NOTE 2 For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent respectively the mass fraction, µ, and the volume fraction, φ.

2 Normative references

3 Terms and definitions

4 Sampling

5 Pump marking

6 Requirements and test methods

6.1 Renewable and recycled carbon fuel components

6.2 Dyes and markers

6.3 Additives

6.4 Generally applicable requirements and test methods

6.5 Climatically dependent requirements and test methods

6.6 Octane reporting

6.7 Precision and dispute

Bibliography

BS EN 228:2025

Automotive fuels. Unleaded petrol. Requirements and test methods

Current

Published:

31 Oct 2025