Servo Pride GEO 15W-40 is a high-performance medium-ash gas engine oil specially formulated to deliver superior protection and stability in heavy-duty commercial vehicles operating on gaseous fuels such as CNG and LPG. It is blended from premium-quality mineral base oils combined with a selective additive system designed to provide exceptional resistance to oxidation, nitration, and corrosion under demanding operating conditions. This oil ensures long-lasting engine performance and dependable protection for fleets and commercial gas-powered engines. The advanced formulation of Servo Pride GEO 15W-40 ensures consistent lubrication even at high temperatures, preventing deposit formation on pistons and valves. Its strong detergent and dispersant additives maintain engine cleanliness, reducing the buildup of carbon, sludge, and varnish. This results in smoother engine operation, reduced maintenance intervals, and extended oil drain periods. The product’s excellent oxidation stability helps prevent oil thickening, while its nitration resistance safeguards critical engine components from wear and pitting. One of the standout features of Servo Pride GEO 15W-40 is its superior protection for valve guide seats, ensuring longer component life and reliable performance in natural gas and bi-fuel engines. The oil’s high thermal stability ensures that it maintains its protective film even under high load and temperature fluctuations. With a kinematic viscosity of 13.5–15.5 cSt at 100°C, it provides excellent lubrication in both high and low temperature operations. Engineered to meet the stringent requirements of CES 20074 of Cummins USA and API CF specifications, Servo Pride GEO 15W-40 ensures compliance with modern gas engine lubrication standards. The oil’s balanced TBN (Total Base Number) of 4.5–5.5 mg KOH/g enables it to neutralize acidic by-products effectively, reducing corrosion and extending oil life. It also maintains optimal sulphated ash content between 0.5–0.6%, which helps prevent harmful ash deposits in combustion chambers and exhaust systems. Approved by Swaraj Mazda, Servo Pride GEO 15W-40 is trusted for its reliability, consistency, and superior performance across a wide range of gaseous fuel applications. Whether used in stationary or mobile engines, this oil offers maximum operational efficiency, smoother performance, and reduced engine downtime. Its outstanding anti-wear, anti-oxidation, and detergent properties make it the preferred choice for fleet operators and industries seeking durable engine protection with cleaner emissions and longer service intervals.

  • fulfills CES 20074 specification of Cummins USA.
  • accepted by Cummins and Ashok Leyland.

Kinematic Viscosity cSt @ 100°C13.5-15.5
Flash point (COC), °C Min.200
Viscosity Index, Min.130
TBN mg KOH/gm0.60