DTFR 15C100 (formerly MB 228.31) is a lower SAPS1 lubricant specification designed for use in high performance medium and heavy-duty diesel engines where a standard oil drain is suitable alongside the use of advanced aftertreatment systems such as Diesel Particulate Filters (DPFs).

DTFR 15C100 lubricants are typically SAE 15W-40, 10W-40 or 10W-30 viscosity grades primarily based on API Group II with low levels of API Group III base oils when required.

The main physical and chemical requirements for DTFR 15C100 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	> 1.0
Phosphorus	ASTM D5185	%wt	≤ 0.12
Sulfur	ASTM D5185	%wt	≤ 0.4
Evaporation loss (NOACK) at 250°C	CEC L-40-93	%	≤ 13
Total Base Number	ASTM D2896	mgKOH/g	≥ 7.0

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

DTFR 15C100 is usually grouped with a range of other approvals. The most frequently seen approvals claimed in conjunction with DTFR 15C100 are ACEA E9, API CK-4, MAN M3775, MTU Type 2.1, Volvo VDS-4.5, Deutz DQC III-18 LA, Caterpillar ECF-3, Cummins CES 20086 & Detroit Diesel DFS 93K222.

For more information on DTFR 15C100 lubricants, contact your Lubrizol representative or visit Mercedes-Benz Specifications for Operating Fluids (MB BeVo).

DTFR 15C100 (formerly MB228.31)