Mobil Pegasus™ 805 Page 1 of 4
Mobil Pegasus™ 805
Mobil Industrial, United States
Gas Engine Oil
Product Description
Mobil Pegasus™ 805 is premium performance gas engine oil engineered to meet the rigorous demands of today's
high output four-cycle engines designed to reduce emissions and improve fuel-efficiency. These gas engines
generally operate under high load and high temperature conditions. Mobil Pegasus 805 is made from high quality
base stocks and an advanced technology additive system that provides exceptional oxidation stability, nitration
resistance and thermal stability. Its detergent and dispersant system controls the formation of carbon deposits,
lacquer and sludge resulting in cleaner engines, longer oil life and reduced filter costs.
Mobil Pegasus 805 is also designed to provide exceptional protection against piston scuffing, scoring and ring
and liner wear. It exhibits excellent resistance to foaming, good demulsibility and protection against corrosion. It
is formulated with very low levels of zinc and phosphorus making it compatible with engines equipped with
catalytic converters.
Features and Benefits
Mobil Pegasus 805 is designed to provide optimum engine life and low maintenance costs. It meets a wide range
of OEM requirements making it an excellent choice where high-speed four-cycle engines from various OEMs are
used. Its unique innovative technology allows for control of valve train component wear and reduces the
potential for scuffing, scoring and accelerated piston and ring wear. The end result is lower costs of operating
and maintaining your gas engines.
Features Advantages and Potential Benefits
Cleaner engines
Exceptional Oxidation and Nitration
Longer oil and filter service
Resistance
Improved engine performance
Reduced scoring, scuffing and wear of pistons and liners
Outstanding Anti-wear and Anti-scuff
High level of protection in fully loaded engines
protection
Reduced maintenance costs
Excellent protection of valve train components
Advanced Technology Additive System Reduced levels of combustion chamber ash
Improved spark plug life
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Features Advantages and Potential Benefits
Protects internal engine components from water, coolant and acidic
Very Effective Corrosion Protection materials
Neutralizes acids formed from combustion or oil degradation
Protects valve train components
Excellent Detergent / Dispersancy Reduces ash and carbon deposits in combustion chambers
Performance Improves spark plug life and performance
Reduces filter replacement costs
Applications
Caterpillar, Superior, Waukesha and other turbocharged, naturally aspirated, medium to high speed
four-cycle engines requiring a low ash oil
Engines experiencing valve face and seat wear
Lean-burn and stoichiometric four-cycle engines
Engines equipped with catalytic converters
Applications using alternate fuels containing low levels of sulfur or chlorine
In field gathering operations where sour gas (low levels of H2S) is used as fuel
Specifications and Approvals
Mobil Pegasus 805 meets or exceeds the requirements of:
CATERPILLAR X
Mobil Pegasus 805 has the following builder approvals:
MWM GmbH TR 0199-99-2105/7, Lube Oils for Gas Engines X
Wartsila 34SG X
Wartsila 32DF X
Wartsila 28SG X
Wartsila 220 SG X
Waukesha (Cogeneration) X
MAN B&W D365600-1.35-1 X
MAN B&W D6628 3.3.6-01 X
Perkins Gas Engine Oil – Natural Gas X
MTU Oil Category 1 - SAE 40 for Gas Engines X
GE Jenbacher TI 1000-1109 (Class A fuel gas, Series 2, 3, 4 & 6) X
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Mobil Pegasus 805 has the following builder approvals:
GE Jenbacher TI 1000-1109 (Class B fuel gas, Series 4 & 6) X
Waukesha 12V/18V 220 GL Applications X
Typical Properties
Mobil Pegasus 805
SAE Grade 40
Viscosity, ASTM D 445
cSt @ 40º C 130
cSt @ 100º C 13.5
Viscosity Index, ASTM D 2270 99
Sulfated Ash, wt%, ASTM D 874 0.5
Foam Resistance, ASTM D 892 Seq I, Tendency/Stability, ml/ml 0/0
Total Base #, mg KOH/g, ASTM D 2896 6.2
Pour Point, ºC, ASTM D 97 -12
Flash Point, ºC, ASTM D 92 262
Specific Gravity 15.6º C/15.6º C, ASTM D 4052 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 and Pegasus are trademarks of ExxonMobil Corporation, or one of its
subsidiaries.
11-2017
Exxon Mobil Corporation
22777 Springwoods Village Parkway
Spring TX 77389
1-800-ASK MOBIL (275-6624)
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Typical Properties are typical of those obtained with normal production tolerance and do not constitute a
specification. Variations that do not affect product performance are to be expected during normal manufacture
and at different blending locations. The information contained herein is subject to change without notice. All
products may not be available locally. For more information, contact your local ExxonMobil contact or visit
www.exxonmobil.com
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or
ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local
entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.
© Copyright 2003-2017 Exxon Mobil Corporation. All Rights Reserved.
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