Product Description
Mobil Pegasus 505 Series are natural gas engine oils formulated exclusively from specially selected base stocks of high stability. These lubricants provide the excellent performance and economy for a wide variety of engine types, service severity and fuel qualities.
Mobil Pegasus 505 and 505 SAE 30 utilize advanced technology to provide excellent detergency/dispersency protection characteristics along with high-temperature anti-scuff and anti-scoring protection. These oils contain ashless and metallic detergents and are fortified with oxidation inhibitors and antiwear agents. Their use helps minimise carbon and ash deposits.
Mobil Pegasus 505 Series oils combat corrosive wear in cylinders and bearings by neutralising acids. They will also minimize wear of rings, liners and bearings and will help curtail wear in valve seats of turbocharged, four-cycle gas engines. These oils provide good engine cleanliness and filter life.
Features and Benefits
Mobil Pegasus 505 Series gas engine oils provide clean engines, low wear rates and improved engine performance. The result is the potential for reduced maintenance costs and improved production capacity. Its good chemical and oxidation stability allows for extended drain intervals and filter cost reduction.
Features |
Advantages and Potential Benefits |
| Outstanding Anti-wear and Anti-scuff Properties | Lower wear of engine components
Reduced scuffing of liners of highly loaded gas engines
Provides excellent break-in protection of high BMEP engines |
| Good Oxidation and Bulk Oil Stability | Cleaner engines
Good oil life
Reduced filter costs
Good resistance to oxidation and nitration
Resists coking and formation of undercrown deposits |
| Low Ash Formulation | Protects valve seats and faces on four-cycle engines
Controls combustion chamber ash formation and improves spark plug performance
Less power loss from detonation caused by combustion chamber deposits |
| Good Corrosion Resistance | Protects bearings and internal components |
| High Quality Basestocks | Reduced port blockage, with longer intervals between cleaning |
Applications
- Crankcases and power cylinders of spark-ignited two- and four-cycle gas engines
- Highly loaded 4-cycle engines requiring anti-scuff protection
- Reciprocating compressor cylinders compressing natural gas
- High output naturally aspirated or turbocharged engines
- Recommended for engines requiring 0.5% sulfated ash
- Has been successfully used in:
Caterpillar
Dresser Rand
Fairbanks- Morse
Superior
Waukesha
Worthington
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Specifications and Approvals
 Mobil Pegasus 505 Series meets or exceeds the following industry and builder specification: |  505 |  505 SAE 30 |
| Dresser Rand Category I, II, III | | X |
Typical Properties
 Mobil Pegasus 505 Series |  505 |  505 SAE 30 |
| SAE Grade | 40 | 30 |
| Viscosity, ASTM D 445 | | |
| cSt @ 40º C | 126 | 85 |
| cSt @ 100º C | 13.1 | 10.2 |
| Viscosity Index, ASTM D 2270 | 97 | 97 |
| Sulfated Ash, wt%, ASTM D 874 | 0.46 | 0.46 |
| TBN #, mg KOH/g, ASTM D 2896 | 2.7 | 2.7 |
| Pour Point, ºC, ASTM D 97 | -15 | -15 |
| Flash Point, ºC, ASTM D 92 | 238 | 236 |
| Density @ 15º C, kg/L | 0.886 | 0.881 |
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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.
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