ACEA C3 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 C3 oils are typically SAE 5W-30 or SAE 5W-40 based on API Group III base oils. The main physical and chemical requirements for ACEA C3 are shown below:
|HTHS viscosity||CEC L-36-A-90||cP||≥ 3.5|
|Sulphated Ash||ASTM D874||%wt||≤ 0.8|
|Phosphorus||ASTM D5185||%wt||≥ 0.070 and ≤ 0.090|
|Sulphur||ASTM D5185||%wt||≤ 0.3|
|Evaporation loss (NOACK)||CEC L-40-A-93||%||≤ 13|
|Total Base Number||ASTM D2896||mgKOH/g||≥ 6|
Note 1 : SAPS refers to Sulphated Ash, Phosphorus and Sulphur, the levels of which are often restricted in the latest performance specifications.
ACEA C3 was first introduced into the ACEA Oil Sequences in 2004 and was updated in the 2007 issue of the Sequences by raising the diesel piston cleanliness requirement in the Volkswagen TDI engine test from ≥ RL206 - 3 points to ≥ RL206.
For ACEA 2010 a number of additional changes to the requirements for ACEA C3 have been made. These include the inclusion of the new OM646LA engine test, as a replacement for the OM602A, along with an increase in sludge handling.
The inclusion of the new OM646LA engine test raises the diesel wear protection performance demanded from ACEA C3 oils.
The changes for ACEA 2010 are summarised below:
|Test||Change for ACEA 2010|
|OM646LA||New test added|
|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 C3-07 oil sequence with the ACEA 2010 version. As shown, ACEA 2010 C3-10 represents an upgrade in wear protection.