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Features and Benefits
Mobil Pegasus 605 Gas Engine Oil provides an additional margin of protection in those applications using contaminated fuel. Its excellent 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 excellent chemical and oxidation stability can result in longer drain periods and reduced filter costs. The high reserve alkalinity of this product allows its use in engines operating on fuels with low to moderate amounts of corrosive materials in the fuel gas.
| Features | Advantages and Potential Benefits |
| Optimised 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 drain intervals Reduced 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 filter life |
| Non-zinc and Non-phosphorus Formulation | Improves catalytic converter performance and longer life |
Applications
Note: Engines operating on fuel gas with elevated levels of sulphur or halogens 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 materials such as TOHCl (Total Organic Halides as Chloride) such as landfill or biomas gas
- Spark ignited four-cycle gas engines with very low lube oil consumption
- Medium and high speed four-cycle engines equipped with catalytic converters requiring a low ash gas engine oil
- Engines experiencing valve train wear and corrosion
- Reciprocating compressors operating on natural gas that contains sulphur or chlorine compounds
- High output or naturally aspirated engines operating at or in excess of rated capacity under high temperatures
Specifications and Approvals
| Mobil Pegasus 605 has the following builder approvals: |
| Waukesha for landfill use |
| MTU Onsite Energy Series 400 Gas Engines |
| MWM GmbH TR 0199-99-2105, Lube Oils for Gas Engines |
Typical Properties
| Mobil Pegasus 605 | |
| SAE Grade | 40 |
| Viscosity, ASTM D 445 | |
| cSt @ 40 ºC | 124 |
| cSt @ 100 ºC | 13.2 |
| Viscosity Index, ASTM D 2270 | 100 |
| Sulfated Ash, wt%, ASTM D 874 | 0.5 |
| TBN #, mg KOH/g, ASTM D 2896 | 7.1 |
| Pour Point, ºC, ASTM D 97 | -15 |
| Flash Point, ºC, ASTM D 92 | 262 |
| Density @ 15.6 ºC, ASTM D 4052, kg/L | 0.89 |
Health and Safety
Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS’s are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.
The Mobil logotype, the Pegasus design are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.
