BS EN 15751-2014 (BS 2000-574-2014) PDF

Full title and description

Automotive fuels — Fatty acid methyl ester (FAME) fuel and blends with diesel fuel — Determination of oxidation stability by accelerated oxidation method. Adopted as BS EN 15751:2014 and also referenced under national numbering BS 2000-574:2014 in BSI catalogues; the standard defines the accelerated-oxidation (induction period) test procedure for FAME and FAME/diesel blends.

Abstract

This European Standard specifies a test method for determination of oxidation stability of fuels for diesel engines by measuring the induction period (up to 48 h) using an accelerated oxidation procedure. It applies to pure FAME intended as fuel, and to blends of FAME with petroleum diesel containing at least 2 % (V/V) FAME. The document includes required reagents, apparatus, sampling, procedure, calculation, expression of results and a precision statement.

General information

• Status: Originally published as EN 15751:2014 and adopted as BS EN 15751:2014 / BS 2000-574:2014; superseded by a revised edition EN 15751:2025 (BS EN 15751:2025).
• Publication date: 2014 (EN approval early 2014; common publication references show 30 September 2014 for the BSI national publication).
• Publisher: CEN (as EN 15751:2014) with national adoption and sale through national bodies (BSI / national standards sellers).
• ICS / categories: Liquid fuels / Biofuels — commonly classified under ICS codes 75.160.20 (liquid fuels) and 75.160.40 (biofuels).
• Edition / version: EN 15751:2014 (BS EN 15751:2014 / BS 2000-574:2014); a revised edition EN 15751:2025 has been published and replaces the 2014 version.
• Number of pages: National publications vary slightly (commonly shown as ~20–22 pages depending on national formatting).

Scope

The standard specifies an accelerated oxidation test method (measuring induction period) for evaluating oxidation stability of FAME fuels and their blends with diesel. The method is intended for induction periods up to 48 hours and covers requirements for reagents, apparatus, sampling, measurement procedure, calculation/evaluation, expression of results and statement of precision; it is intended for use where stability of FAME or FAME-containing blends must be determined for quality control, specification compliance and comparative testing.

Key topics and requirements

• Accelerated oxidation (Rancimat / autoxidation-style) test to determine induction period (oxidation stability) up to 48 h.
• Applicability: pure FAME fuels and blends with petroleum diesel ≥ 2 % (V/V) FAME.
• Detailed specification of reagents and apparatus, sampling and sample preparation procedures.
• Step-by-step test procedure, calculation of induction period, expression and reporting of results.
• Precision and reproducibility statement (limits and applicability noted; precision not guaranteed for induction periods > 48 h).
• Notes on effects of additives (e.g., cetane improvers such as EHN) and cross‑references to related test methods.

Typical use and users

Used by fuel testing laboratories, refineries, biodiesel producers, fuel quality control and R&D groups, regulatory bodies and standardization committees to verify oxidation stability of FAME and FAME/diesel blends for specification compliance, storage stability assessment and comparative testing. Laboratories performing this test usually combine it with other fuel quality analyses (e.g., EN 14214, EN 15940).

Related standards

Closely related and cross-referenced standards include EN 14112 (oxidation stability test for FAME at 110 °C / fat and oil derivatives), EN 14214 (FAME fuel specification), EN 15940 (paraffinic diesel specification) and other CEN/ISO test methods for distillate fuel stability and sampling; national adoptions (BS, DIN, NEN, EVS, etc.) provide identical or equivalent texts.

Keywords

FAME, fatty acid methyl ester, oxidation stability, induction period, accelerated oxidation, diesel blends, EN 15751, BS 2000-574, fuel testing, fuel quality.

FAQ

Q: What is this standard?

A: EN 15751:2014 (adopted nationally as BS EN 15751:2014 / BS 2000-574:2014) is a CEN test method document that specifies an accelerated oxidation procedure to determine the oxidation stability (induction period) of FAME fuels and blends with diesel.

Q: What does it cover?

A: It covers the principle and detailed procedure for measuring induction period up to 48 hours, required reagents and apparatus, sampling and sample preparation, data calculation and expression of results, and a precision statement. It also includes informative notes on factors that can affect stability (e.g., certain additives).

Q: Who typically uses it?

A: Accredited fuel-testing laboratories, biodiesel producers, fuel suppliers, R&D groups and regulatory bodies that need to assess or verify oxidation stability of FAME and FAME-containing diesel blends.

Q: Is it current or superseded?

A: The 2014 edition (EN 15751:2014 / BS EN 15751:2014) has been superseded by a revised edition published as EN 15751:2025 (BS EN 15751:2025); users should consult the 2025 edition for the current test method and any procedural updates.

Q: Is it part of a series?

A: It is closely connected with other fuel and FAME standards (for example EN 14112, EN 14214, EN 15940) and sits within CEN/TC work on automotive fuels and fuel test methods; laboratories commonly use it alongside those related standards.

Q: What are the key keywords?

A: FAME; oxidation stability; induction period; accelerated oxidation; diesel blend testing; EN 15751; BS 2000-574; fuel quality.