Mobil RR Super 2409

Railroad Crankcase Oils

Mobil RR Super 2409 is a high performing heavy-duty crankcase lubricant for locomotive diesel engines. This product is designed to meet the severe service demands imposed by the latest railroad diesel locomotive engines. An Electro-Motive Diesel (EMD) and General Electric (GE) endorsed additive system provides outstanding engine protection, oil consumption control and extended oil drain interval capability.



Features and Benefits

  • Zinc Free - Excellent Silver Bearing Lubricity
  • Excellent Oxidation, Sludge-Soot Handling and Viscosity Control
  • Outstanding Deposit, Corrosion and Wear Control
  • Formulated for use with low sulfur and ultra-low sulfur diesel fuels
  • Extended oil drain intervals and high locomotive utilization rates



Mobil RR Super 2409 is formulated to an LMOA Generation 6 quality level with an engine manufacturer endorsed additive package. They meet the requirements of for all EMD and General Electric diesel locomotives.


Specifications and Approvals

This product has the following approvals:

EMD Domestic Common Additive Approach (recognition ltr on file)

GE LMOA Gen 6 - Fundamental Approval (letter on file)


Properties and Specifications



SAE 20W-40

Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Viscosity Index, ASTM D2270


Flash Point, °C, ASTM D92


Pour Point, °C, ASTM D97


Total Base Number, mgKOH/g, ASTM D2896


Ash, Sulfated, mass%, ASTM D874


Zinc, mg/kg, ASTM D5185



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @