Product Description
Mobil Pegasus 801 - SAE 30 is a premium performance gas engine oil intended
for the lubrication of all classes of gas engines operating at low, medium and
high speeds where low ash or ashless oils are recommended. It provides
outstanding engine cleanliness and performance by preventing the formation of
carbon and ash deposits on pistons, in ring belt areas, on exhaust and intake
ports, on valves and valve stems and in combustion chambers. Mobil Pegasus 801
- SAE 30 also reduces the potential for port carboning of two-cycle gas
engines. It minimizes engine wear and protects valve faces, seats and guides
of turbocharged, four-cycle engines. Mobil Pegasus 801 - SAE 30 provides
exceptional protection against scuffing in demanding engine applications and
also provides exellent protection against corrosion of internal engine
components. Filter and oil life are extended and the high performance
capability of the Mobil Pegasus 801 - SAE 30 can also extend the time between
engine maintenance and overhaul periods.
The Mobil Pegasus
801 - SAE 30 is the latest generation of ashless detergent and anti-scuff gas
engine oil formulated from highly refined base oils and an advanced technology
additive system. It is engineered to provide a high level of chemical and
thermal stability resulting in cleaner engines and higher engine performance.
Mobil Pegasus 801 - SAE 30 provides exceptional cleanliness and optimum wear
protection in the most severe applications, without the disadvantage of
increased ash deposits.
Features and Benefits
Mobil Pegasus 801 - SAE 30 provides outstanding performance in both two- and
four-cycle gas engines making it a good choice for all applications where
ashless and low-ash oils are recommended. It's advanced additive system
protects high BMEP engines against scuffing, scoring and wear particularly
during critical break-in periods. The result is long engine life and low
maintenance costs. Mobil Pegasus 801-30 has demonstrated outstanding
performance over an exceptionally wide range of engines and operating
conditions. Where mixed engines are in service Mobil Pegasus 801 - SAE 30
provides a single product which simplifies inventory and reduces the potential
for product misapplication.
Features
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Advantages and Potential Benefits
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Outstanding Oxidation Stability
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Longer engine and oil life Cleaner engines Extended filter life
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Advanced Technology Very Low Ash Formulation
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Lower levels of port carboning (two-cycle engines) Reduced valve and
combustion chamber ash and carbon build-up Longer spark plug life
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Outstanding Anti-wear and Anti-scuff Protection
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Less engine wear Increased engine life Excellent break-in
protection for high BMEP engines
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Exceptional Nitration Resistance
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Less engine sludging Improved filter life Reduced engine
deposits
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High Level Corrosion Protection
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Protects engine components against corrosive wear Longer engine life
and lower maintenance costs
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Applications
- Mobil Pegasus 801 - SAE 30 is recommended for the lubrication of the crankcase, power cylinders, and compressor cylinders of spark-ignited, two- and four-cycle gas engines operating on clean fuel.
- Ideal for engines that drive generators for power production or gas compressors in gathering, transmission, storage, and distribution of natural gas.
- Ebulliently cooled gas engines
- Engines in remote locations which operate virtually unattended for long periods. In many cases, the engines are operated at, or in excess of full-rated output, while other applications are intermittent or stand-by service. Reliability, is therefore essential.
- Mobil Pegasus 801 - SAE 30 shows excellent results in multipurpose applications, particularly involving highly turbocharged engines requiring anti-scuff protection for cylinder liners and piston skirts.
- When natural or petroleum gas is being compressed and is dry and free of suspended liquids or corrosive components, the compressor cylinders usually are lubricated with the same oil as the engine crankcase. Mobil Pegasus 801 - SAE 30 has been successful in this service.
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Specifications and Approvals

Mobil Pegasus 801 - SAE 30 has the following builder approvals:
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| Dresser Rand Category I, II and III | |

Mobil Pegasus 801 - SAE 30 recommended for use in applications requiring:
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| Ashless or low-ash gas engine oils | |
| Outstanding anti-scuff protection | |
| Wide range of mixed gas engine designs | |
Typical Properties

Mobil Pegasus 801 - SAE 30
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| SAE Grade | 30 |
| Viscosity, ASTM D 445 | |
| cSt @ 40º C | 85 |
| cSt @ 100º C | 10.0 |
| Viscosity Index, ASTM D 2270 | 97 |
| Sulfated Ash, wt%, ASTM D 874 | 0.13 |
| Total Base #, mg KOH/g, ASTM D 2896 | 2.8 |
| Pour Point, ºC, ASTM D 97 | -15 |
| Flash Point, ºC, ASTM D 92 | 238 |
| Specific Gravity 15.6º C/15.6º C, ASTM D 1298 | 0.882 |
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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 and Delvac are trademarks of ExxonMobil Corporation, or one of its subsidiaries.
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