Mercedes-Benz MB229.51

MB229.51 oils are Top Tier lower SAPS¹ lubricants designed for use in high performance gasoline and light duty diesel engines where advanced aftertreatment systems such as Diesel Particulate Filters (DPFs) are used.

MB229.51 oils are typically SAE 5W-40, 5W-30 or 0W-30 based on API Group III or a mix of API Group III and Group IV base oils.
The main physical and chemical requirements for MB229.51 are shown below:

Requirement Method Unit Limit
HTHS viscosity at 150°C CEC L-36-A-90 cP ≥ 3.5
Sulphated Ash ASTM D874 %wt < 0.8
Phosphorus ASTM D5185 %wt ≥ 0.05 and ≤ 0.09
Sulfur ASTM D5185 %wt ≤ 0.3
Evaporation loss (NOACK) at 250°C CEC L-40-93 % ≤ 10
Total Base Number ASTM D2896 mgKOH/g ≥ 6.0

Note 1: SAPS refers to Sulphated Ash, Phosphorus and Sulfur, the levels of which are often restricted in the latest performance specifications.

MB229.51 is usually coupled with a range of different combinations of other approvals depending on the viscosity grade of the lubricant, The most frequently seen approvals claimed in conjunction with MB229.51 being ACEA C3, BMW Longlife-04, Volkswagen 50400/50700 or Volkswagen 50500/50501, GM dexos2™, Porsche C30 or A40.

For more information on MB229.51 oils, contact your Lubrizol representative.

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.