- Stationary gas engines
SAE 40
Low-ash oil for natural gas engines, compatible with exhaust-catalyst applications
ViscositySAE
Recommended for
Same grade SAE 40 · Stationary gas engines
Business customers only. We sell wholesale, invoiced to registered companies.
| Property | Typical value |
|---|---|
| Gravity, API (ASTM D286) | 27.5 |
| Flash point, °C (ASTM D92) | 265 |
| cSt @ 40° C (ASTM D445) | 130 |
| cSt @ 100° C (ASTM D445) | 13.5 |
| Viscosity index (ASTM D567) | 99 |
| Sulfated Ash, % wt. (ASTM D874) | 0.48 |
| TBN, mg KoH/g (ASTM D2896) | 6.2 |

Cat NGEO (Natural Gas Engine Oil) SAE 40 is an engine oil for natural gas applications and other engines requiring low-ash oil. It is formulated from select base stocks blended with special additives to give an economical engine oil for natural gas applications, developed, tested and approved by Caterpillar to meet the same standards as Genuine Cat Parts. It is designed for engines using gaseous fuels, is compatible with exhaust-catalyst applications requiring low-phosphorus oil, and gives optimum engine and oil life with low-sulfur gaseous fuels (below 0.43 mg hydrogen sulfide per mega Joule). Cat NGEO performs throughout the long oil-change intervals typical of gaseous-fuel engines, and its anti-oxidation and anti-nitration properties prevent carbon-deposit buildup to minimize scuffing, scoring and wear, while protecting valve guide faces and seals, neutralizing acids to prevent rust and copper corrosion, and resisting foaming and sludge formation at high temperature. Typical characteristics: SAE 40, API gravity 27.5, flash point 265°C, pour point -12°C, kinematic viscosity 130 cSt at 40°C and 13.5 cSt at 100°C, viscosity index 99, sulfated ash 0.48% wt., TBN 6.2, phosphorus 0.030% wt. and calcium 0.125% wt.
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