CNG Engine Oil refers to a special type of lubricating oil formulated specifically for engines that run on Compressed Natural Gas (CNG). These engines operate under different conditions compared to petrol or diesel engines, and they require engine oils that address their unique needs.
Key Features of CNG Engine Oil:
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High Oxidation Stability: CNG combustion produces higher combustion temperatures, which can oxidize oil faster. CNG oils are designed to resist this.
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Low Ash Formulation: CNG engines are sensitive to ash buildup which can damage components and catalytic converters. Hence, CNG oils often have low sulfated ash content.
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Detergent/Dispersant Additives: Help to keep the engine clean and free of carbon deposits.
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Enhanced Valve Protection: CNG combustion can cause increased wear on valve seats, so additives in CNG oil often address this.
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Low Volatility: Reduces oil consumption and evaporative losses at high temperatures.
Common Viscosity Grades:
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SAE 15W-40
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SAE 20W-50 (in warmer climates)
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Some synthetic options like SAE 5W-30 are also available for high-performance or newer engines.
Applications:
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CNG-powered cars, buses, auto-rickshaws, and light commercial vehicles.
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Fleet operations where clean combustion and long oil life are critical.
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