oSIST prEN 16734:2026

Automotive fuels - Automotive B10 diesel fuel - Requirements and test methods

This document specifies requirements and test methods for marketed and delivered automotive B10 diesel fuel, i.e. diesel fuel containing up to 10,0 %(V/V) fatty acid methyl ester (FAME). It is applicable to fuel for use in diesel engine vehicles compatible with automotive B10 diesel fuel.
NOTE 1 This product is allowed in Europe [4], but national legislation can set additional requirements or rules concerning, or even prohibiting, marketing or delivering of the product.
NOTE 2 For the purposes of this document, the terms "% (m/m)" and "% (V/V)" are used to represent respectively the mass fraction and the volume fraction.

Kraftstoffe für Kraftfahrzeuge - B10 Dieselkraftstoff - Anforderungen und Prüfverfahren

Dieses Dokument legt Anforderungen an und Prüfverfahren für gehandelten und ausgelieferten Diesel
kraftstoffB10, d.h. Dieselkraftstoff, der bis zu 10,0%(V/V) Fettsäure-Methylester (FAME,en:fatty acid methyl ester) enthält, fest. Es ist anzuwenden für Kraftstoff für die Verwendung in Kraftfahrzeugen mit Dieselmotoren, die kompatibel mit DieselkraftstoffB10 sind.
ANMERKUNG1 Dieses Produkt ist in Europa zugelassen[4]; einzelstaatliche Rechtsvorschriften können jedoch zusätz
liche Anforderungen oder Regeln hinsichtlich des Inverkehrbringens oder der Auslieferung des Produktes festlegen oder sogar verbieten.
ANMERKUNG2 Für die Zwecke dieses Dokuments wird zur Angabe des Massenanteils einer Substanz der Ausdruck„%(m/m)ʺ und für den Volumenanteil einer Substanz der Ausdruck "%(V/V)ʺ verwendet.

Carburants pour automobiles - Carburant B10 pour moteur automobile diesel - Exigences et méthodes d'essai

Le présent document spécifie des exigences et des méthodes d'essai pour le carburant pour moteur diesel (gazole) B10 mis sur le marché et livré, c'est-à-dire le carburant diesel contenant jusqu’à 10,0 % (V/V) d’esters méthyliques d’acides gras (EMAG). Il est applicable au gazole destiné aux véhicules à moteur diesel compatibles avec le carburant B10 pour automobiles.
NOTE 1 Ce produit est autorisé en Europe [4], mais une législation nationale peut établir des exigences supplémentaires ou des règles concernant, ou même interdisant, le marketing et la livraison du produit.
NOTE 2 Pour les besoins du présent document, les expressions « % (m/m) » et « % (V/V) » sont utilisées pour désigner respectivement les fractions massiques et les fractions volumiques.

Goriva za motorna vozila - Dizelsko gorivo za motorna vozila B10 - Zahteve in preskusne metode

General Information

• Status: Not Published
• Public Enquiry End Date: 03-May-2026
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: NAD - Petroleum products, lubricants and related products
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 16-Feb-2026
• Due Date: 06-Jul-2026
• Completion Date: 06-May-2026
• Directive: Not Harmonized98/70/EC - Quality of petrol and diesel fuels (Dir. 93/12/EEC amendment)
• Mandate: M/394 - Mandate to CEN on the revision of EN 590 to increase the concentration of FAME and FAEE to 10% v/v
• Ref Project: prEN 16734 - Automotive fuels - Automotive B10 diesel fuel - Requirements and test methods

Relations

• Revises: SIST EN 16734:2022 - Automotive fuels - Automotive B10 diesel fuel - Requirements and test methods
• Effective Date: 01-Apr-2026

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2026
Goriva za motorna vozila - Dizelsko gorivo za motorna vozila B10 - Zahteve in
preskusne metode
Automotive fuels - Automotive B10 diesel fuel - Requirements and test methods
Kraftstoffe für Kraftfahrzeuge - B10 Dieselkraftstoff - Anforderungen und Prüfverfahren
Carburants pour automobiles - Carburant B10 pour moteur automobile diesel -
Exigences et méthodes d'essai
Ta slovenski standard je istoveten z: prEN 16734
ICS:
75.160.20 Tekoča goriva Liquid fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2026
ICS 75.160.20 Will supersede EN 16734:2022
English Version
Automotive fuels - Automotive B10 diesel fuel -
Requirements and test methods
Carburants pour automobiles - Carburant B10 pour Kraftstoffe für Kraftfahrzeuge - B10 Dieselkraftstoff -
moteur automobile diesel - Exigences et méthodes Anforderungen und Prüfverfahren
d'essai
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 19.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, 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
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16734:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Sampling . 8
5 Pump marking . 8
6 Requirements and test methods . 8
6.1 Dyes and markers . 8
6.2 Additives . 8
6.2.1 General . 8
6.2.2 Methylcyclopentadienyl manganese tricarbonyl (MMT) . 8
6.3 Fatty acid methyl ester (FAME) . 9
6.4 Other (bio-) components . 9
6.5 Particle count . 9
6.5.1 Requirements . 9
6.5.2 Test method . 10
6.6 Generally applicable requirements and related test methods . 10
6.7 Climate dependent requirements and related test methods . 12
6.8 Precision and dispute . 15
Annex A (informative) Further information regarding particle count requirements . 16
Bibliography . 21

European foreword
This document (prEN 16734:2026) 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 document will supersede EN 16734:2022.
This document has been prepared under a standardization request [1] addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Significant technical changes between this document and the previous edition are:
— removal of dated references in the tables and main text;
— the parameters in the tables that have a link with the FQD are no longer in bold;
— introduction of new definitions in Clause 3 “Terms and definitions”;
— inclusion of a particle count limit of 10 000 counts/ml for particles ≥ 4 μm at “the point of particle
certification” in a new Table 2 and 6.5;
— introduction of test method IP 630 procedures A and B to measure the number of particles ≥ 4 μm in
diesel fuel;
— addition of the constant pressure viscometer method (EN ISO 18335) as an alternative test method
to EN ISO 3104 for the determination of viscosity;
— addition of the portable rapid mid-infrared analyzer (IP 639) as an alternative test method to EN
14078 for the determination of fatty acid methyl ester (FAME) content;
3 3
— reduction of the minimum density for summer grades (A, B, C) from 820,0 kg/m to 815,0 kg/m and
displacement of the parameter to Table 1;
— adaptation of 6.7 (former 6.6) “Climate dependent requirements and related test methods” with the
transformation of the requirement to countries to develop a national normative annex defining
climate-dependent requirements into a recommendation to National Standardization Bodies to
develop such an annex;
— removal of the A-deviations (for Sweden and Germany) in previous Annex A
— addition of new Annex A “Further information regarding particle count requirements”.
Introduction
This document describes a specification for diesel fuel containing up to 10,0 % (V/V) Fatty Acid Methyl
Ester. This product is not suitable for all vehicles, so consumers and providers can consult vehicle
manufacturers or manuals before use.
Requirements following amendment 2003/17/EC [3], 2009/30/EC [4], 2011/63/EU [5], 2014/77/EU
[6], 2015/1513/EC [17], 2018/1999/EU [18] and 2023/2413/EU [19] to the European Fuels Quality
Directive 98/70/EC [2], are taken into account.
The marking at the pump of this product is in line with the requirements of the Fuels Quality Directive
and the Alternative Fuels Infrastructure Regulation [7].
1 Scope
This document specifies requirements and test methods for marketed and delivered automotive B10
diesel fuel, i.e. diesel fuel containing up to 10,0 %(V/V) fatty acid methyl ester (FAME). It is applicable to
fuel for use in diesel engine vehicles compatible with automotive B10 diesel fuel.
NOTE 1 This product is allowed in Europe [4], but national legislation can set additional requirements or rules
concerning, or even prohibiting, marketing or delivering of the product.
NOTE 2 For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent
respectively the mass fraction and the volume fraction.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 116, Diesel and domestic heating fuels — Determination of cold filter plugging point — Stepwise cooling
bath method
EN 12662-1, Liquid petroleum products — Determination of total contamination — Part 1: Middle
distillates and diesel fuels
EN 12916, Petroleum products — Determination of aromatic hydrocarbon types in middle distillates —
High performance liquid chromatography method with refractive index detection
EN 14078, Liquid petroleum products — Determination of fatty acid methyl ester (FAME) content in middle
distillates — Infrared spectrometry method
EN 14214, Liquid petroleum products — Fatty acid methyl esters (FAME) for use in diesel engines and
heating applications — Requirements and test methods
EN 15195, Liquid petroleum products — Determination of ignition delay and derived cetane number (DCN)
of middle distillate fuels by combustion in a constant volume chamber
EN 15751, Automotive fuels - Fatty acid methyl ester (FAME) fuel and blends with diesel fuel - Determination
of oxidation stability by accelerated oxidation method at 110 °C
EN 16091, Liquid petroleum products — Middle distillates and fatty acid methyl ester (FAME) fuels and
blends — Determination of oxidation stability by rapid small scale oxidation test (RSSOT)
EN 16329, Diesel and domestic heating fuels — Determination of cold filter plugging point — Linear cooling
bath method
EN 16576, Automotive fuels — Determination of manganese and iron content in diesel — Inductively
coupled plasma optical emission spectrometry (ICP OES) method
EN 16715, Liquid petroleum products — Determination of ignition delay and derived cetane number (DCN)
of middle distillate fuels — Ignition delay and combustion delay determination using a constant volume
combustion chamber with direct fuel injection
EN 16906, Liquid petroleum products — Determination of the ignition quality of diesel fuels — Fixed
compression ratio engine method
EN 16942, Fuels — Identification of vehicle compatibility — Graphical expression for consumer information
EN 17155, Liquid petroleum products — Determination of indicated cetane number (ICN) of middle
distillate fuels — Primary reference fuels calibration method using a constant volume combustion chamber
EN 17306, Liquid petroleum products — Determination of distillation characteristics at atmospheric
pressure — Micro-distillation
EN ISO 2160, Petroleum products — Corrosiveness to copper — Copper strip test (ISO 2160)
EN ISO 2719, Determination of flash point — Pensky-Martens closed cup method (ISO 2719)
EN ISO 3015, Petroleum and related products from natural or synthetic sources — Determination of cloud
point (ISO 3015)
EN ISO 3104, Petroleum products — Transparent and opaque liquids — Determination of kinematic
viscosity and calculation of dynamic viscosity (ISO 3104)
EN ISO 3170, Hydrocarbon Liquids — Manual sampling (ISO 3170)
EN ISO 3171, Petroleum liquids — Automatic pipeline sampling (ISO 3171)
EN ISO 3405, Petroleum and related products from natural or synthetic sources — Determination of
distillation characteristics at atmospheric pressure (ISO 3405)
EN ISO 3675, Crude petroleum and liquid petroleum products — Laboratory determination of density —
Hydrometer method (ISO 3675)
EN ISO 3924, Petroleum products — Determination of boiling range distribution — Gas chromatography
method (ISO 3924)
EN ISO 4259-2, Petroleum and related products — Precision of measurement methods and results — Part 2:
Interpretation and application of precision data in relation to methods of test (ISO 4259-2)
EN ISO 4264, Petroleum products — Calculation of cetane index of middle-distillate fuels by the four
variable equation (ISO 4264)
EN ISO 5165, Petroleum products — Determination of the ignition quality of diesel fuels — Cetane engine
method (ISO 5165)
EN ISO 6245, Petroleum products — Determination of ash (ISO 6245)
EN ISO 10370, Petroleum products — Determination of carbon residue — Micro method (ISO 10370)
EN ISO 12156-1, Diesel fuel — Assessment of lubricity using the high-frequency reciprocating rig (HFRR) —
Part 1: Test method (ISO 12156-1)
EN ISO 12185, Crude petroleum, petroleum products and related products — Determination of density —
Laboratory density meter with an oscillating U tube sensor (ISO 12185)
EN ISO 12205, Petroleum products — Determination of the oxidation stability of middle-distillate fuels
(ISO 12205)
EN ISO 12937, Petroleum products — Determination of water — Coulometric Karl Fischer titration method
(ISO 12937)
EN ISO 13032, Petroleum and related products — Determination of low concentration of sulfur in
automotive fuels — Energy-dispersive X-ray fluorescence spectrometric method (ISO 13032)
EN ISO 13759, Petroleum products — Determination of alkyl nitrate in diesel fuels — Spectrometric method
(ISO 13759)
EN ISO 18335, Petroleum products and related products — Determination of kinematic viscosity by
calculation from the measured dynamic viscosity and density — Method by constant pressure viscometer
(ISO 18335)
EN ISO 20846, Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet
fluorescence method (ISO 20846)
EN ISO 20884, Petroleum products — Determination of sulfur content of automotive fuels — Wavelength-
dispersive X-ray fluorescence spectrometry (ISO 20884)
EN ISO 22995, Petroleum products — Determination of cloud point — Automated step-wise cooling method
(ISO 22995)
EN ISO 23581, Petroleum products and related products — Determination of kinematic viscosity — Method
by Stabinger type viscometer(ISO 23581)
IP 630, Determination of the concentration of dispersed particles in diesel fuel — Automatic Particle
Counter (APC) Light Obscuration Method
IP 639, Determination of biodiesel (fatty acid methyl esters) content in middle distillates by portable rapid
mid-infrared analyzer
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at https://www.electropedia.org/
3.1
point of particle certification
point of import of EN 16734 automotive diesel fuel into a CEN member country from a non-CEN member
country, or, point of production (3.2) of EN 16734 automotive diesel fuel inside a CEN member country
Note 1 to entry: Figure A.1 provides diagrammatic examples of points of particle certification.
3.2
point of production
point where fuel and/or blend components, when blended together, are certified to conform to EN 16734
automotive diesel fuel inside a CEN member country
Note 1 to entry: The point of production can be, but is not limited to, a refinery or blending hub.
Note 2 to entry: A diesel fuel not fully conforming to EN 16734 is considered a blend component.
3.3
particle certification
confirmation that the fuel meets the particle count requirement as per Table 2
3.4
particle recertification
confirmation, in the supply chain after the point of particle certification (3.1), that the automotive diesel
fuel still meets the particle count requirement as per Table 2
4 Sampling
Samples shall be taken as described in EN ISO 3170 or EN ISO 3171 and/or in accordance with the
requirements of national standards or regulations for the sampling of automotive diesel fuel. The national
requirements should be set out in detail or should be referred to by reference in a National Annex to this
document.
In view of the sensitivity of some of the test methods referred to in this document, particular attention
shall be paid to compliance with any guidance on sampling containers which is included in the test
method standard.
5 Pump marking
Information to be marked on dispensing pumps and nozzles used for delivering automotive B10 diesel
fuel, and the dimensions of the mark shall be in accordance with EN 16942.
Labelling shall be clearly visible, easily legible and displayed at any point where diesel fuel with metallic
additives is made available to consumers. The label shall contain: “Contains metallic additives” in the
national language(s).
Further indication on dispensing pumps in the national language of “Not suitable for all vehicles; consult
vehicle manufacturer or manual before use” is also strongly recommended.
6 Requirements and test methods
6.1 Dyes and markers
The use of dyes or markers is allowed.
6.2 Additives
6.2.1 General
In order to improve and/or maintain the performance quality, the use of additives is allowed. Suitable
fuel additives without known harmful side-effects are recommended in the appropriate amount, to help
to avoid deterioration of driveability and emissions control durability. Other technical means with
equivalent effect may also be used.
NOTE At the time of publication of this document, deposit forming tendency test methods suitable for routine
control purposes have not yet been identified and developed.
6.2.2 Methylcyclopentadienyl manganese tricarbonyl (MMT)
When methylcyclopentadienyl manganese tricarbonyl (MMT) is used, a specific labelling is required (see
also Clause 5). The presence of MMT is limited via a manganese content limit as in Table 1.
6.3 Fatty acid methyl ester (FAME)
Automotive B10 diesel fuel may contain up to 10,0 % (V/V) of FAME complying with EN 14214.
NOTE 1 A suitable method for the separation and identification of FAME is given in EN 14331 [8].
Climate dependent requirements for FAME as a blending component for use in automotive B10 diesel
fuel according to this document are set out in FprEN 14214:2026, 6.4.3. It is strongly recommended that
the specific grades are specified on a national basis according to local climatic conditions and the FAME
volume in the diesel fuel.
The finished blend of automotive B10 diesel fuel should also comply with the climate dependent
requirements set out in 6.7 of this document.
Cold flow additives, when used in FAME, should be specifically matched to the base diesel fuel and FAME
quality to ensure correct performance consistent with the requirements set out in this document. The
choice could result in incompatibility between the cold flow additives used in the FAME and the diesel
fuel. The choice of cold flow additive technology should be a contractual matter between the fuel blender
and the FAME supplier taking into account the climatic-dependent requirements of the finished
automotive B10 diesel fuel.
NOTE 2 Cold flow requirements for FAME as a blend component in automotive B10 diesel fuel are set out in
Tables 3 and 4 and, when nationally defined, in the National Annex of FprEN 14214:2026, in order to control
maximum content of saturated monoglycerides in the final EN 16734 blend to ensure trouble-free operation. Work
is on-going to identify a suitable performance test to control this aspect of low temperature performance.
In order to improve the oxidation stability of FAME, it is strongly recommended to add oxidation stability
enhancing additives to FAME at the production stage and before storage.
NOTE 3 The use of 1 000 mg/kg of 2,6-di-tert-butyl-4-hydroxytoluene (BHT) has proven to be effective, although
the resulting oxidation stability varies depending on the FAME feedstocks.
CAUTION — There is a potential risk of precipitate formation with oxidation stability enhancing
additives at low temperatures in low aromatic arctic fuel. Caution should therefore be taken in the choice
of oxidation stability enhancing additives to arctic grade FAME.
6.4 Other (bio-) components
Limits for FAME do not apply to other (non-petroleum derived) hydrocarbons, such as Hydrotreated
Vegetable Oil (HVO), Gas To Liquid (GTL) or Biomass To Liquid (BTL) derived hydrocarbons, since these
paraffinic diesel components are allowed in any proportions provided that the final blend complies with
the requirements of this document.
The co-processing of renewable feedstock at refineries is also allowed provided that the final automotive
B10 diesel fuel meets the requirements of this document.
6.5 Particle count
6.5.1 Requirements
At the point of particle certification, EN 16734 automotive diesel fuel before or after the addition of FAME
and/or paraffinic diesel, shall meet the requirements of Table 2.
Particle recertification is not required if movement occurs inside or between CEN member countries.
Subsequent blending with diesel fuel complying with EN 16734 and/or FAME and/or paraffinic diesel in
a CEN member country after the point of particle certification does not require particle recertification.

For clarification of the term “renewable” see Directive (EU) 2018/2001 [11].
Annex A provides further information and illustration regarding particle count requirements.
NOTE 1 Attention is drawn to CEN/TR 15367-1 [9] and to CEN/TR 17548 [20] in relation to the issue of abrasive
wear of fuel injection equipment by hard particles in diesel fuel.
NOTE 2 Attention is drawn to Clause 4 regarding sampling. In view of the various opportunities to contaminate
samples which can affect the particle count result, it is important that the required sampling standards are followed
carefully.
6.5.2 Test method
The limiting value for the particle count given in Table 2 applies to hard particles. In the context of this
document and in the test method IP 630, hard particles are defined as particles that are not dissolved by
specified co-solvents. Hard particles, that can be abrasive, typically contain iron and/or silicon. IP 630
procedure A measures total particles and IP 630 procedure B measures undissolved hard particles.
Therefore, on a given sample, the result obtained using procedure B is normally expected to be equal to
or less than the result obtained using procedure A, that is the simpler and faster test. Getting a particle
count result below the maximum limit specified in Table 2 with procedure A provides confidence that the
particle count limit would also be met with procedure B.
6.6 Generally applicable requirements and related test me
...