ACEA C1 oils are Top Tier lower SAPS1 lubricants. They are designed for use in high performance gasoline and light duty diesel engines where advanced aftertreatment systems such as Diesel Particulate Filters (DPFs) and Three Way Catalysts (TWC) are used.
ACEA C1 oils are typically low HTHS (≤3.5cP) SAE 5W-30 based on API Group III base oils. The main physical and chemical requirements for ACEA C1 are shown below:
|HTHS viscosity||CEC L-36-A-90||cP||
|Sulphated Ash||ASTM D874||%wt||
|Evaporation loss (NOACK)||CEC L-40-A-93||%||
|Total Base Number||ASTM D2896||mgKOH/g||
The low HTHS (≤3.5cP) and low sulphated ash (≤0.5%) required by ACEA C1 limits the number of additional performance claims that can be coupled with ACEA C1. ACEA C1 is usually coupled with JASO DL-1.
At present there are no OEM performance claims that require an ACEA C1 level of performance.
Note 1: SAPS refers to Sulphated Ash, Phosphorus and Sulphur, the levels of which are often restricted in the latest performance specifications.
ACEA C1 was first introduced into the ACEA Oil Sequences in 2004 and was not updated in the 2007 issue of the Sequences.
For ACEA 2010 a number of changes to the requirements for ACEA C1 have been made. These include the inclusion of the new OM646LA engine test, as a replacement for the OM602A, along with increases in sludge handling and fuel economy improvement.
The inclusion of the new OM646LA engine test raises the diesel wear protection performance demanded from ACEA C1 oils.
The changes for ACEA 2010 are summarised below:
|Test||Change for ACEA 2010|
|OM646LA||New test added|
|M111FE||Fuel economy improvement increased from ≥ 2.5% to ≥ 3.0%|
|M111SL||Average engine sludge to requirement to increase from ≥ RL140 to ≥ RL140 +4 standard deviations
or ≥ 9.0%
The relative performance diagrams presented below compare Lubrizol's interpretation of the performance of requirements of the existing ACEA 2007 C1-07 oil sequence with the ACEA 2010 version. As shown, ACEA 2010 C1-10 represents an upgrade in wear protection, sludge handling and fuel economy improvement.