MB229.31 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.
MB229.31 was Daimler’s first lower SAPS specification, originally introduced in 2004 for service fill usage in Euro 4 vehicles. Although the performance requirements have changed over time MB229.31 does not require the same level of fuel economy improvement, or contain any requirement for chassis dynamometer fuel economy testing, as seen in the higher performance MB229.51 specification.
MB229.31 oils are typically SAE 5W-40 or 5W-30 based on American Petroleum Institute. The primary oil and natural gas trade association in the United States. API operates a voluntary licensing and certification program that allows engine oil marketers to use the API Engine Oil Quality Marks if their products meet specific requirements. Group III base oils.
The main physical and chemical requirements for MB229.31 are shown below:
|High Temperature High Shear. A measure of a fluid’s resistance to flow under conditions resembling highly-loaded journal bearings in fired internal combustion engines, typically 1 million s–1 at 150°C. A measure of a fluid's resistance to flow. A fluid with a higher viscosity flows less easily. at 150°C||CEC L-36-A-90||cP||≥ 3.5|
|A product of the combustion of metals commonly found in detergents. As a lubricant property, sulfated ash content is a measure of metal content (usually Zinc, Calcium, and Magnesium) and allows formulators to stay within specified limits in order to minimize the negative effects of abrasive ash particles. Sulfated ash is determined by charring the oil, treating the residue with sulfuric acid, and evaporating to dryness, the result being expressed as % by mass.||American Society for Testing and Materials. An organization that develops international standards for industry, including test methods, specifications, and best practices. Many tests that certify a lubricant to a specification are overseen by 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||%||≤ 12|
|Total Base Number||ASTM D2896||mgKOH/g||≥ 6.0|
Note 1: SAPS refers to Sulphated Metallic deposits formed in the combustion chamber and other engine parts during high-temperature operation., Phosphorus and Sulfur, the levels of which are often restricted in the latest performance specifications.
MB229.31 is usually claimed on lubricants which also meet MB229.51. The most frequently seen approvals claimed in conjunction with MB229.31 are therefore European Automobile Manufacturers Association (Association des Constructeurs Européens d'Automobiles). The primary automotive standards organization in the European Union, ACEA defines performance specifications for automotive lubricants. C3, BMW Longlife-04, Volkswagen 50400/50700 or Volkswagen 50500/50501, GM dexos2™, Porsche C30 or A40.
For more information on MB229.31 oils, contact your Lubrizol representative.