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Engine Oils Product Data castrol.com/GPS 800 255 4417 May 2025 GPS Castrol ® Duratec ™ LFG 40 Features and Benefits Castrol Duratec LFG's proprietary low ash technology provides extended oil drains and decreased oil consumption while protecting valves from harmful silicon deposits in stationary natural gas engines. User benefits include: • Proprietary low ash technology designed to maximize head life by dispersing harmful silicon deposits formed by siloxanes in landfill gas keeping valves clean and free of deposits. • Superior TBN retention and acid control for neutralizing harmful acids that attack engine components while allowing for safe extended drain intervals. • Well balanced formulation with high-quality hydrocracked base stocks ensures low oil consumption leading to less carbon deposits and lacquering. • Strong Oxidation and Nitration protection for high combustion temperatures from natural gas that volatizes and thickens oil. Castrol Duratec LFG 40 is designed for use in a wide range of stationery equipment including Caterpillar, Waukesha, Ulstein, Jenbacher, Deutz, Wartsila, Superior, MAN, and Cooper-Bessemer. Warranty and Protection Requirements Meets all manufacturer's warranty requirements for stationary natural gas engines. Typical Properties SAE Grade Method 40 Kinematic Viscosity @100°C, cSt ASTM D445 12.95 Kinematic Viscosity @40°C, cSt ASTM D445 120 Viscosity Index ASTM D2270 100 Sulfated Ash, %wt ASTM D874 0.48 Total Base Number, Mg KOH/g ASTM D2896 5.6 Pour Point, °C ASTM D97 -39 Appearance Visual Clear and Bright 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. B22 ecastrof