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Engine Oils
Product Data
Castrol
®
Railroad Engine Oil 40
November 2021
Castrol Railroad Engine Oil 40 is a premium-quality, LMAO Generation 7 railroad
diesel engine oil. It is designed for use in GE and EMD Tier 4-compliant locomotives
utilizing ULSD and operating under severe conditions. It features low oil consumption
and reduced emissions and can be used in a wide variety of older model applications.
Castrol Railroad Engine Oil 40 has a specific combination of dispersant additives and
inhibitors that enables minimal levels of oil oxidation and thickening in severe service.
Its zinc content is less than 10 ppm, which provides silver wrist pin bushing
protection. Its sustained alkalinity provides extra protection against corrosive wear
and oxidation, ensuring long component life.
Advantages
Castrol Railroad Engine Oil 40 delivers:
• Advanced detergent and dispersant technology
• Corrosive wear control for longer equipment life
• Excellent alkalinity (BN) retention
• Help in lowering locomotive engine maintenance costs
Industry Specifications and OEM Approvals by Grade
• LMOA Generation V
• General Electric Generation IV, Long Life
• Internal listing of the Electro-Motive Division (EMD) of General Motors
Typical Properties
SAE Grade Method Units Typical
Appearance Visual Opaque
API Gravity ASTM D4052 -- 27.6
Kinematic Viscosity @100°C, cSt ASTM D445 mm
2
/s 14.7
Kinematic Viscosity @40°C, cSt ASTM D445 mm
2
/s 141
Viscosity Index ASTM D2270 -- 102
Total Base Number, Mg KOH/g ASTM D2896 mg KOH/g 11
Pour Point ASTM D5950 °C -15
Flash Point ASTM D92 °C 450
Ash, Sulfated ASTM D874 % wt. 1.15
Zinc, ppm max Method 16 mg/kg (ppm) 10
Due to continual product research and development, the information contained herein is based on products
purchased in the U.S. and subject to change without notification. Typical properties may vary slightly.
B 27
