DTFR 15B120 (formerly MB 228.5) is a Top Tier, high TBN lubricant specification designed for use in high performance medium and heavy-duty diesel engines where advanced aftertreatment systems such as Diesel Particulate Filters (DPFs) are not fitted.

DTFR 15B120 lubricants are typically SAE 10W-40 viscosity grades based on API Group III + II base oils.

The main physical and chemical requirements for DTFR 15B120 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 and ≤ 2.0
Phosphorus	ASTM D5185	%wt	Rate and Report
Sulfur	ASTM D5185	%wt	Rate and Report
Evaporation loss (NOACK) at 250°C	CEC L-40-93	%	≤ 13
Total Base Number	ASTM D2896	mgKOH/g	≥ 12.0

DTFR 15B120 is usually grouped with a range of other approvals. The most frequently seen approvals claimed in conjunction with DTFR 15B120 are ACEA E4, API CI-4, MAN M3277, MTU Type 3, Volvo VDS-3, Deutz DQC IV-18, Caterpillar ECF-2, Cummins CES 20077/20078 and Scania LDF-3.

For more information on DTFR 15B120 lubricants, contact your Lubrizol representative or visit Mercedes-Benz Specifications for Operating Fluids (MB BeVo).