DTFR 15C120 (formerly MB 228.52) is a Top Tier low SAPS¹ lubricant specification designed for use in select Euro VI / US Tier 4 engines used in buses and industrial/off road applications where advanced aftertreatment systems such as Diesel Particulate Filters (DPFs) are fitted.

DTFR 15C120 oils are typically SAE 10W-40, 5W-30 or 10W-30 viscosity grades based on API Group III, Group III + II or Group III + Group IV base oils.

DTFR 15C120 shares many common characteristics with DTFR 15C110. The major difference between the two specifications is that MB 228.52 has a restriction on the level of calcium allowed in the lubricant and is designed for use in select applications/engines mentioned above.

The main physical and chemical requirements for DTFR 15C120 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	≤ 0.08
Sulfur	ASTM D5185	%wt	≤ 0.3
Calcium	ASTM D5185	%wt	≤ 0.15
Evaporation loss (NOACK) at 250°C	CEC L-40-93	%	≤ 12
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 15C120 is usually grouped with a range of other approvals which may vary depending on the viscosity grade. The most frequently seen approvals claimed in conjunction with DTFR 15C120 are ACEA E6, CK-4, DTFR 15C110, MAN M3775, MTU Type 3.1, Volvo VDS-4.5 & Deutz DQC IV-18 LA.

For more information on DTFR 15C120 lubricants, contact your Lubrizol representative or visit Mercedes-Benz Specifications for Operating Fluids (MB BeVo).

DTFR 15C120 (formerly MB228.52)