The Mercedes-Benz OM471 is a 12.8-liter inline-six heavy-duty diesel used in Mercedes-Benz truck applications including the Actros and Arocs. There is no single oil specification, viscosity or capacity that applies to every OM471. The correct lubricant depends on engine generation, vehicle configuration and the Mercedes-Benz Truck DTFR specification assigned to the application.
A 5W-30 oil is not automatically correct because the engine is an OM471. Mercedes-Benz has used different DTFR oil specifications across OM471 generations, including oils with very different high-temperature/high-shear viscosity requirements. Verify the DTFR specification before selecting the oil.
Mercedes-Benz OM471 engines can use different oil specifications depending on generation and application. Verified Mercedes-Benz Truck service-product specifications include DTFR 15C110, DTFR 15C130 and DTFR 15C140. These correspond to different viscosity and HTHS requirements and should not be treated as interchangeable.
| Specification | Former Mercedes-Benz Sheet | Typical Mercedes-Benz Oil | Important Point |
|---|---|---|---|
| DTFR 15C110 | MB 228.51 | 10W-40 or approved 5W-30 variants | Low-SAPS heavy-duty specification with HTHS ≥ 3.5 cP. |
| DTFR 15C130 | MB 228.61 | 5W-30 | Lower-HTHS fuel-economy specification for engines specifically designed for it. |
| DTFR 15C140 | MB 228.71 | 0W-20 | Very-low-viscosity specification used in newer OM471 applications. |
Mercedes-Benz Truck has progressively introduced lower-viscosity oils as the OM471 platform has evolved. The newer specification does not automatically replace the older one in every engine.
Low-SAPS heavy-duty engine-oil specification for modern emissions-equipped Mercedes-Benz commercial diesels.
Mercedes-Benz Genuine Oil references include SAE 10W-40 DTFR 15C110 and SAE 5W-30 DTFR 15C110 LT products.
This is not the same thing as API FA-4.
Lower-HTHS specification developed for improved fuel economy in selected OM471 applications.
Mercedes-Benz Genuine Oil is available as SAE 5W-30 DTFR 15C130.
Use only where the engine documentation specifically allows this specification.
Very-low-viscosity specification for newer Mercedes-Benz heavy-duty engines, including later OM471 applications.
Mercedes-Benz Genuine Oil is available as SAE 0W-20 DTFR 15C140.
Not backward-compatible. Do not use it unless explicitly required.
The OM471 does not have one universal 42-quart capacity. Mercedes-Benz engine documentation shows different capacities depending on the oil-pan configuration.
| Engine | Approximate Capacity With Oil Filter | Why It Varies |
|---|---|---|
| Mercedes-Benz OM471 |
Approximately 37 L, 39 L or 40 L About 39.1, 41.2 or 42.3 US qt |
Mercedes-Benz lists multiple oil-pan configurations. |
All three viscosities can appear in Mercedes-Benz Truck OM471-era lubrication systems, but they belong to different specifications and engine generations.
DTFR 15C110, formerly MB 228.51, is a low-SAPS specification with an HTHS requirement at or above 3.5 cP.
Later OM471 applications may use lower-HTHS specifications developed around fuel economy.
AMSOIL product selection should follow the exact Mercedes-Benz Truck specification. There is no single AMSOIL product that should be presented as correct for every OM471 generation.
Current AMSOIL technical literature lists MB 228.51 for Signature Series 5W-30 DHD.
The OM471 is a Mercedes-Benz global heavy-duty engine used in Mercedes-Benz truck platforms such as the Actros and Arocs. It should not be confused with the Detroit DD-series engines used in current North American Freightliner and Western Star trucks.
Do not use a universal 25,000-mile or 15,000-mile interval for every OM471. Mercedes-Benz maintenance schedules vary by truck configuration, operating profile, monthly mileage, oil specification and market.
Use the maintenance interval specified for the exact vehicle and engine configuration. Mercedes-Benz publishes application-specific service schedules rather than one universal OM471 drain interval.
If extending beyond the OEM schedule, use an oil-analysis program and stay within the lubricant manufacturer's published limits. Do not extend drains solely because the oil is synthetic.
It depends on the OM471 generation and vehicle application. Mercedes-Benz Truck specifications associated with OM471-era engines include DTFR 15C110 (formerly MB 228.51), DTFR 15C130 (formerly MB 228.61) and DTFR 15C140 (MB 228.71). Verify the exact DTFR requirement before selecting oil.
No. MB 228.51 is now DTFR 15C110 and is a low-SAPS heavy-duty specification with an HTHS requirement of at least 3.5 cP. It should not be described as an API FA-4 specification.
Mercedes-Benz engine documentation lists approximately 37, 39 or 40 liters with the oil filter depending on oil-pan configuration. That equals roughly 39.1, 41.2 or 42.3 US quarts. Verify the vehicle-specific configuration before filling.
Yes, some OM471 applications use 5W-30, but the specification matters. Mercedes-Benz lists 5W-30 products under specifications including DTFR 15C110 LT and DTFR 15C130. Do not select the oil based on viscosity alone.
Newer applications designed for DTFR 15C140 / MB 228.71 can use SAE 0W-20. That specification is not backward-compatible and must not be used in an older OM471 unless Mercedes-Benz specifically permits it.
No. Current North American Cascadia engine offerings use Detroit and Cummins engines. The OM471 is a Mercedes-Benz global heavy-duty engine used in Mercedes-Benz truck platforms.
