Product Description
Mobil Pegasus 701 Series are premium 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 quality.
Mobil
Pegasus 701 and 701 SAE 30 are formulated with ashless dispersants, effective
oxidation and corrosion inhibitors, and antiwear agents. They provide
excellent dispersancy, and good high-temperature stability. The formulation
approach is very effective for controlling carbon and ash deposits in gas
engines.
The ashless dispersants in Mobil Pegasus 701 and SAE
30 help prevent the formation of deposits that can cause detonation. Port
carbon cleaning intervals in two-cycle, naturally aspirated and turbocharged
gas engines may be extended by using Pegasus 701 Series oils. Mobil Pegasus
701 Series has increased engine overhaul periods and oil filter and spark plug
life in both four-cycle and two-cycle gas engines.
Features and Benefits
Mobil Pegasus 701 Series gas engine oils provide cleaner engines, long oil and
filter life, and low lube oil consumption. The result is the potential for
extended engine life and reduced overhaul costs.
Features
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Advantages and Potential Benefits
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Good Anti-wear Properties
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Lower wear of engine components Provides good break-in protection of
high BMEP engines
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Good Oxidation and Bulk Oil Stability
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Cleaner engines Extended drain intervals Reduced filter costs
Good resistance to oxidation and nitration Reduces coking and
formation of undercrown deposits
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Good Corrosion Resistance
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Reduces valve guide wear in four-cycle gas engines Protects bearings
and internal components Reduced port blockage, with longer intervals
between cleaning
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High Quality Basestocks
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Less power loss from detonation caused by combustion chamber deposits
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Applications
- Crankcases and power cylinders of spark-ignited two- and four-cycle gas engines
- High speed two-cycle gas engines
- Suitable for use in modern two-cycle and four-cycle slow-speed gas engines except where severity of application requires special heavy-duty, load-carrying performance
- Highly loaded 4-cycle engines requiring anti-scuff protection
- Reciprocating compressor cylinders compressing natural gas
- High output or naturally aspirated turbocharged engines operating at or in excess of rated capacity under high temperatures
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Specifications and Approvals

Mobil Pegasus 701 Series meets or exceeds the following industry and builder
specifications:
| 
701
| 
701 SAE 30
|
| Dresser Rand Category I, II | | X |
Typical Properties

Mobil Pegasus 701 Series
| 
701
| 
701 SAE 30
|
| SAE Grade | 40 | 30 |
| Viscosity, ASTM D 445 | | |
| cSt @ 40º C | 132 | 85 |
| cSt @ 100º C | 13.5 | 10 |
| Viscosity Index, ASTM D 2270 | 97 | 97 |
| Sulfated Ash, wt%, ASTM D 874 | 0.07 | 0.07 |
| TBN #, mg KOH/g, ASTM D 2896 | 2.2 | 1.7 |
| Pour Point, ºC, ASTM D 97 | -15 | -18 |
| Flash Point, ºC, ASTM D 92 | 249 | 238 |
| Density @ 15º C, kg/L | 0.885 | 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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