CIMAC WG fuels to publish five Guidelines supporting ISO 8217-2024

Only a few days after the publication of ISO 8217:2024, the CIMAC Working Group Fuels has issued the first of five CIMAC Guidelines. Another four Guidelines will follow in the course of June. Dr. Bartosz Rozmyslowicz, Chairman of the WG 7, WIN GD, explains: “ISO 8217 defines the requirements and specifications for fuels used in marine diesel engines and boilers. The 7th edition of the ISO specification has been long awaited. It replaces the 2017 version and contains some important changes, since it is based on the most up-to-date information including recent fuel statistics and operational experiences of the users. CIMAC Working Group Fuels created guidelines complementary to the new ISO 8217 with additional information that could not be included in the standard. We hope our guidelines will facilitate better understanding of the standard and lead to its wider adaptation by the industry.”

John Stirling, Secretary WG7, World Fuel Services, adds: “With the important addition of allowing up to 100% bio (FAME) and renewable fuel in blends and increasing the number of tables from two to four, we hope that these Guidelines will answer at least some of the questions that we expect to arise. Additionally, they will help explain how the important changes impact the purchase and use of the new fuels, while assisting with the onboard practicalities.”

The first of new CIMAC Guidelines is “ISO 8217:2024 – FAQ”. The four more to follow are:

  • Marine fuels containing FAME
  • Overview and interpretation of total sediment test results in the context of ISO 8217:2024
  • The interpretation of marine fuel analysis test results
  • Design and operation of fuel cleaning systems for diesel engines

The FAQ can already be downloaded from the CIMAC website here under "Latest publications", the others will be added to the website on each release date, during June.

CIMAC WG 7 Fuels consists of experienced specialists within marine fuels. Their goal is to prepare recommendations and make tools for the industry on how to operate on fuel, and choose fuels that will ensure safe operation of the diesel engines.


CIMAC is the leading global non-profit association promoting the development of ship propulsion, train drive and power generation. The association consists of National Member Associations and Corporate Members in America, Asia and Europe. CIMAC provides a forum for technical interchange with all parties interested in piston engines, gas turbine systems, non-shaftline propulsion systems, automation and controls, system integration and digitalization solutions. 

CIMAC acts as a global platform for discussion through a range of events, namely the CIMAC Congress (once every three years), CIMAC Circles, CASCADES and web seminars. The content-related work evolves around CIMAC's Strategy and Workings Groups which produce publications on various topics.