Mobil Pegasus 610
Mobil Pegasus 610 is a high performance natural gas engine oil primarily intended for the lubrication of modern medium and high speed four-cycle engines operating on fuel containing corrosive materials such as hydrogen sulphide or halogens. These lean-burn engines often operate with low oil consumption, which can increase valve guide wear and upper cylinder corrosion. Mobil Pegasus 610 is formulated with high reserve alkalinity to help neutralise acidic combustion by-products and protect critical engine components.
Mobil Pegasus 610 is blended from high quality mineral base oils combined with an advanced additive system designed to provide excellent protection for both engine and compressor components. The formulation delivers strong resistance to oxidation and nitration while maintaining chemical stability under severe operating conditions. This helps reduce sludge formation, control deposits and maintain engine cleanliness over extended service intervals.
One of the key benefits of Mobil Pegasus 610 is its high TBN and reserve alkalinity. These properties help control corrosion and wear when engines operate on contaminated gas fuels. The oil helps protect valve seats, valve faces and upper cylinder components while also controlling combustion chamber ash formation and improving spark plug performance. This contributes to improved reliability and reduced maintenance requirements.
Mobil Pegasus 610 also provides excellent anti-wear and anti-scuff protection. The formulation helps reduce piston scuffing, liner wear and ring wear in highly loaded gas engines. This protection supports longer equipment life and improved operational reliability, particularly in demanding landfill gas and biomass gas applications.
The product offers outstanding oxidation and chemical stability, helping extend oil drain intervals and reduce filter costs. Its detergent and dispersant system controls deposits, neutralises acid formation and maintains cleaner engines. These characteristics support improved performance, reduced downtime and enhanced production efficiency.
Mobil Pegasus 610 is recommended for gas engines operating on fuels containing moderate levels of hydrogen sulphide or other corrosive components. It is suitable for spark-ignited four-stroke gas engines, reciprocating compressors handling contaminated gas and high output engines operating under heavy load and high temperature conditions.
Physical characteristics include a kinematic viscosity of approximately 130 mm²/s at 40°C and 13.8 mm²/s at 100°C, with a viscosity index of around 102. Mobil Pegasus 610 has a density of approximately 0.89 kg/l at 15°C, a flash point of approximately 264°C, a pour point of approximately −18°C and a base number of 7.3 mg KOH/g.
