ACEA 2023

The ACEA Oil Sequences for Light-duty engines define the minimum quality level for engine lubricants used in service fill in gasoline engines and light duty diesel engines.

The 2023 update brings two changes: reintroduction of the OM646LA wear test to the legacy categories, and the addition of the new ACEA C7 category.

The OM646LA wear test (CEC L-99-08) was originally introduced into the ACEA sequences in ACEA-08. ACEA removed the test from ACEA-21 due to concerns about engine availability which would impact the lifetime and availability of the engine test. ACEA, the CEC and Mercedes-Benz have now resolved these concerns ensuring that the OM646LA engine will continue to be available for the foreseeable future. As ACEA still see the technical need to ensure wear protection in diesel engines, they have re-introduced the OM646LA wear test to all categories where it has previously been included with the same requirements as per ACEA-16 (A3/B4, A5/B5, C2, C3, C4 and C5). The OM646LA wear test is not included in the categories introduced in ACEA-21 and ACEA-23 (A7/B7, C6 and C7).

ACEA C7 is a new ultra-low HTHS oil category focused on improving fuel economy in vehicles with all types of modern aftertreatment systems. ACEA C7 is a SAE 0W-16 category (HTHS ≥2.3 and ≤2.6 mPa.s). ACEA C7 is based upon ACEA C6, retaining all performance parameters except fuel economy, which has more stringent requirements (≥0.3% versus reference).

For a deeper dive into specifications, see the Lubrizol Ready Reference Guide, the industry's go-to resource for understanding fuel and lubricant performance principles and requirements. 

The heavy-duty engine ACEA 2022 sequences can be found here.