ACEA C4 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 C4 oils are typically SAE 5W-30 based on API Group III base oils. The main physical and chemical requirements for ACEA C4 are shown below:
|HTHS viscosity||CEC L-36-A-90||cP||≥ 3.5|
|Sulphated Ash||ASTM D874||%wt||≤ 0.5|
|Phosphorus||ASTM D5185||%wt||≤ 0.090|
|Sulphur||ASTM D5185||%wt||≤ 0.2|
|Evaporation loss (NOACK)||CEC L-40-A-93||%||≤ 11|
|Total Base Number||ASTM D2896||mgKOH/g||≥ 6|
The high HTHS (≥3.5cP) and low sulphated ash (≤0.5%) required by ACEA C4 limits the number of additional performance claims that can be coupled with ACEA C4.
ACEA C4 is usually coupled with Renault RN0720.
Renault's RN0720 performance specification builds on top of an ACEA C4 baseline with additional performance requirements in areas such as detergency, oxidation and durability.
Note 1 : SAPS refers to Sulphated Ash, Phosphorus and Sulphur, the levels of which are often restricted in the latest performance specifications.
ACEA C4 was first introduced into the ACEA Oil Sequences in 2007, and many of the changes made for other sequences in ACEA 2010, such as increased sludge handling, were already incorporated in ACEA 2007 C4-07.
For ACEA 2010 the inclusion of the new OM646LA engine test, as a replacement for the OM602A, raises the diesel wear protection performance demanded from ACEA C4 oils.
The changes for ACEA 2010 are summarised below:
|Test||Change for ACEA 2010|
|OM646LA||New test added|
The relative performance diagrams presented below compare Lubrizol's interpretation of the performance of requirements of the existing ACEA 2007 C4-07 oil sequence with the ACEA 2010 version. As shown, ACEA 2010 C4-10 represents an upgrade in wear protection.