Diol 11 RD 40

Railroad Crankcase Oils

DIOL™ 11 RD series oils are premium heavy-duty crankcase lubricants for locomotive diesel engines. These products were developed to meet the stringent performance requirements of Tier 4 locomotives. Older locomotive engines will also benefit from using the DIOL 11 RD series. An Electro-Motive Diesel (EMD) and General Electric (GE) endorsed additive system provides excellent engine protection, enhanced oxidation performance, improved oil consumption control, and enhanced Alkalinity / TBN retention, and oil drain interval extension capability*.

*Compared to DIOL 9 RD series


Equipment lubricant recommendations

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Data sheets

Features and Benefits

•  Zinc Free - Excellent Silver Bearing Lubricity

•  Enhanced Oxidation, Sludge-Soot Handling and Viscosity Control

•  Excellent Deposit, Corrosion and Wear Control

•  Formulated for use with low sulfur and ultra-low sulfur diesel fuels

•  Chlorine Free



DIOL 11 RD oils are formulated to an LMOA Generation 7 quality level with an engine manufacturer endorsed additive package. They meet the requirements of for all EMD and General Electric diesel locomotives.


The DIOL 11 RD product line incorporates a field proven additive technology that offers enhanced oxidation performance and wear inhibitors. This addresses the deleterious effects of lower oil consumption and engine modifications in the new Tier 4 locomotive engines. The DIOL 11 RD series offers enhanced Alkalinity / TBN retention, oxidation and thermal stability, and better acid control


Specifications and Approvals

This product has the following approvals:

11 RD 20W-40

LMOA Gen 7 - Fundamental Approval (letter on file)



Properties and Specifications


11 RD 40

11 RD 20W-40


SAE 40

SAE 20W-40

Flash Point, °C, ASTM D92



Flash Point, Cleveland Open Cup, °C, ASTM D92



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



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



Pour Point, °C, ASTM D97



Total Base Number, mgKOH/g, ASTM D2896



Viscosity Index, ASTM D2270



Zinc, ppm, ASTM D4951



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) @ http://www.msds.exxonmobil.com/psims/psims.aspx