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Engine Oils Product Data castrol.com/GPS 800 255 4417 May 2025 GPS Castrol ® Railroad Engine Oil 40 Castrol Railroad Engine Oil 40 is a premium-quality, LMOA Generation 7 railroad diesel engine oil. 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 Castrol Railroad Engine Oil 40 is designed for use in GE and EMD Tier 4-compliant locomotives utilizing ULSD and operating under severe conditions. 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. B27 Scastrof' 1:/1,.e'°"&, 5f40 ecastrof