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Engine Oils
Product Data
Castrol
®
Duratec
™
ES 15W-40
September 2019
Features/Bene ts
Castrol Duratec ES 15W-40 enables "extreme" extended drain intervals while maintaining outstanding protection and
delivers an advanced detergent/dispersant system that has been designed to reduce deposit formation and improve
oxidation characteristics while offering excellent corrosion control, TBN retention and outstanding wear control. User
bene ts include:
• Exceptional nitration and oxidation control compared to conventional on-road natural gas engine oil
• Specially designed for on-road trucks
• Exceptional anti-wear and extreme-pressure protection
• Reduces deposits and maintains engine cleanliness
• Wide range of operating temperatures
Castrol Duratec ES 15W-40 is designed for use in a wide range of natural gas equipment including Cummins, Mack,
Volvo, and other on road engines requiring a low-ash natural gas engine oil.
Industry Approvals and OEM Speci cations by Grade
• Cummins CES 20092
Typical Properties
SAE Grade Method Units Typical
Kinematic Viscosity @100°C, cSt ASTM D445 mm
2
/s 15.1
Kinematic Viscosity @40°C, cSt ASTM D445 mm
2
/s 107
Viscosity Index ASTM D2270 -- 148
Sulfated Ash, %wt ASTM D874 % wt. 0.9
Total Base Number, Mg KOH/g ASTM D2896 mg/g KOH 6.7
Pour Point, °C ASTM D97 °C -42
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 noti cation. Typical properties may vary slightly.
B 20
