The engine oil is an important design element for the function and service life of the engine. According to the requirements for the different vehicle applications, there are different MB engine oil specifications in Service Fill:
MB engine oil specifications for spark ignition engines(can also be applied in some passenger car diesel engines without diesel particulate filter):
MB 226.5, MB 229.1, MB 229.3, MB 229.5
MB engine oil specifications for passenger car diesel engines (with diesel particulate filter)(can also be applied in some spark ignition engines):
Limited permissible content of ash-forming components to protect the diesel particulate filter
MB 226.51, 229.31, MB 229.51, MB 229.52
MB engine oil specifications for commercial vehicle diesel engines (without diesel particulate filter):
Multigrade oil: MB 228.1, MB 228.3, MB 228.5
Single grade engine oil: MB 228.0, MB 228.2
MB engine oil specifications for commercial vehicle diesel engines (with diesel particulate filter):
Limited permissible content of ash-forming components to protect the diesel particulate filter
MB 228.31, MB 228.51
The engine oil specifications approved in each case for individual vehicle/engine model series can be found in the operator's manual and Service information, where applicable. An overview can be found in Sheet MB 223.2.
The engine oil's essential tasks and requirements are:
Wear protection
Corrosion protection
Contribution to lowering the fuel consumption
Detergency (prevention/removal of deposits on metal surfaces)
Dispersancy (suspension of insoluble components)
Avoidance of oil sludge formation
Thermal stability/oxidation stability/nitration stability
Cooling of hot components
Shear resistance (maintaining the viscosity properties even under/after high shear loads)
Pre-ignition stability (no contribution to uncontrolled combustion pre-ignition)
Compatibility with elastomers/metals/paints
Avoidance of foam formation
Low evaporation loss
Mixability with other engine oils/shelf life
The technical requirements to be met for an approval are documented in the overview sheet "Mercedes-Benz specifications for engine oils (service fill)" (accessible via "BEAM" Internet access).