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REGULATION


ACEA oil sequences - The European engine


oils standards Latest Release: ACEA 2021 Sequences for Light Duty Engines


Dr. Suhair Abdelhalim, Senior Manager, Global Master Data, Global Technical Service, Petronas Lubricants International


Background


ACEA Oil Sequences are the industry standards for the baseline performance of engine oils required by European automotive manufacturers. These standards were first introduced in 1996, replacing the older European standards known as CCMC. The intention of ACEA members was to update these standards and release new sequences every two years, however, due to many factors the interval was, unintentionally, extended after 2012 to four years or even more. See fig. (A) below.


between the three organisations, agreement was reached, and the latest ACEA 2021 LD Sequences were released on 30th April.


Evolution of ACEA Sequences: Figure A: Timeline for ACEA Light Duty Sequences


It took the industry associations (ACEA, ATC & ATIEL) considerable time to release the new sequences for ACEA and, this time, only Light Duty sequences were released while HD sequences were deferred to a later date. The delay was mainly driven by the time needed to complete the development of the tests required to reflect the higher performance needed for new engine technologies and the extensive discussions on the limits assigned initially by ACEA. The introduction of these new tests with such severe limits made the formulation to meet new ACEA requirements rather impossible or the products become too expensive for the customers. After several months of deliberation


22 LUBE MAGAZINE NO.165 OCTOBER 2021


ACEA oil sequences started in 1996 with A-categories for light duty gasoline oils, B-categories for light duty diesel oils and E-categories for heavy duty oils. In 2004 significant changes were introduced, especially in the light duty sequences where A & B categories were combined, and C-categories were added to the sequences to cover applications equipped with DPF (diesel particulate filters) and later for vehicles fitted with GPF (gasoline particulate filters). The introduction of DPF combined with mandating the incorporation of renewable fuels (Biodiesel and Ethanol) in diesel and gasoline respectively, posed new risks for engine oils that required new performance tests to be added into the sequences. This led to increase in engine oil performance in ACEA 2012 sequences to ensure compatibility with biodiesel B7 as shown in fig (B) below.


Figure B: Structure of ACEA Sequences Continued on page 24


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