When choosing an engine oil for natural gas engines, it's essential to understand the different certifications and approvals that define oil performance. Two commonly referenced standards are Cummins CES 20085 and Caterpillar G3600 oil requirements. While both are designed for natural gas-powered engines, they have specific demands tailored to the respective engine manufacturers.
1. CES 20085: Cummins' Natural Gas Engine Oil Specification
Cummins CES 20085 is an oil specification set by Cummins Inc. for their natural gas engines, ensuring optimal performance and longevity.
Key Requirements:
✅ Low ash content (≤ 0.6%) to prevent valve and combustion chamber deposits.
✅ Superior oxidation and nitration resistance to combat high-temperature operation.
✅ High TBN (Total Base Number) retention for longer oil drain intervals.
✅ Strong wear protection to minimize internal component degradation.
This standard is essential for Cummins gas engines, including those used in power generation, gas compression, and industrial applications.
2. Caterpillar G3600 Oil Requirements
The Caterpillar G3600 series is a popular natural gas engine used in gas compression and power generation. Unlike Cummins CES 20085, Caterpillar does not have a specific "certification" but instead defines performance criteria for approved oils.
Key Oil Requirements:
✅ Ultra-low ash (<0.5%) to prevent exhaust valve deposits.
✅ High oxidation and nitration resistance to extend oil life.
✅ Robust wear protection for pistons, liners, and bearings.
✅ Enhanced detergency and dispersancy to maintain engine cleanliness.
✅ Compatibility with Caterpillar’s high-performance ignition and fuel systems.
For Caterpillar G3600 engines, the oil must meet Caterpillar’s published standards rather than a formal OEM certification like CES 20085.
Which Oil Meets Both CES 20085 and G3600 Requirements?
Sinopec Natural Gas SAE 40 Stationary Engine Oil
✔ Meets or exceeds Cummins CES 20085 requirements.
✔ Designed for Caterpillar G3600 and other natural gas engines.
✔ Low-ash formulation prevents deposit buildup.
✔ Excellent oxidation resistance for longer drain intervals.
✔ Ideal for gas compression and power generation applications.
For operators managing mixed fleets of Cummins and Caterpillar gas engines, Sinopec Natural Gas SAE 40 provides a single-solution lubricant that ensures compliance with both CES 20085 and Caterpillar’s G3600 oil requirements.
📢 Protect your engines with the best oil today!
