Mobil Pegasus 610 Gas Engine Oil provides additional protection in applications using contaminated fuel. Its detergent / dispersant technology also results in cleaner engines, lower wear rates and improved engine performance. The use of this product can result in reduced maintenance costs and improved production capacity. Its chemical and oxidation stability can result in longer drain periods and reduced filter costs. 

Features Advantages and Potential Benefits
High TBN and Reserve Alkalinity Controls wear and corrosion when using contaminated gas
Protects valve seats and faces on four-cycle engines
Controls combustion chamber ash formation and improves spark plug performance
Outstanding Anti-wear and Anti-scuff Properties Lower wear of engine components
Reduced scuffing of liners in highly loaded gas engines
Provides excellent break-in protection
Excellent Oxidation and Chemical Stability Cleaner engines
Extended oil drain intervals
Reduced oil filter costs
Excellent resistance to oxidation and nitration
Effective Corrosion Resistance Reduces valve guide wear in four-cycle gas engines
Protects bearings and internal components
Exceptional Detergent / Dispersant Properties Neutralises formation of acids in the oil
Protection of upper cylinder and valve train components
Cleaner engines
Longer oil filter life
Non-zinc and Non-Phosphorus Formulation Extend catalytic converter life and performance


Note : Engines operating on fuel gas with elevated levels of sulphur or chlorine compounds should also have coolant (jacket water) and oil temperatures raised.

  • Gas engines operating on fuel that contains moderate levels of hydrogen sulphide (H2S)
  • Engines operating on fuel containing other corrosive components such as TOHCl (Total Organic Halides as Chloride)
  • Spark ignited four-stroke cycle gas engines with very low oil consumption
  • Reciprocating compressors operating on natural gas that contains sulphur or halogens
  • High output or naturally aspirated engines operating at or in excess of rated capacity under high temperatures


Mobil Pegasus 610 has the following builder approval:  
Waukesha for landfill gas applications  

Typical Properties

Mobil Pegasus 610  
SAE Grade 40
Viscosity, ASTM D 445  
cSt @ 40º C 130
cSt @ 100º C 13.8
Viscosity Index, ASTM D 2270 102
Sulfated Ash, wt%, ASTM D 874 1.0
TBN #, mg KOH/g, ASTM D 2896 8.6
Pour Point, ºC, ASTM D 97 -18
Flash Point, ºC, ASTM D 92 264
Density @ 15.6º C, ASTM D 4052, kg/L 0.89


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