Mobil Pegasus 805 Ultra

Mobil Industrial, Colombia

Gas Engine Oil

Product Description

Mobil Pegasus™ 805 Ultra is a high 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. It meets a wide range of OEM requirements making it a great choice where high-speed four-cycle engines from various OEMs are used.


Mobil Pegasus 805 Ultra is designed to provide very good protection against piston scuffing, scoring and ring and liner wear. It also exhibits excellent resistance to foaming, good demulsibility and high-level corrosion protection. It is formulated with low levels of zinc and phosphorus making it compatible with engines equipped with catalytic converters.


Features and Benefits

•  Extraordinary oxidation stability and nitration resistance provide cleaner engines, good oil life, and reduced oil disposal and filter costs

•  Very good anti-wear characteristics help to reduce wear of engine components and reduce scuffing of pistons and liners

•  Good corrosion resistance protects bearings and internal components

•  Extraordinary detergent-dispersant system provides protection of valve train components, cleaner engines and longer filter and spark plug life

•  Very good foam separation reduces potential negative effects of air on wear and oil degradation



     •  Caterpillar, Waukesha and other turbocharged, naturally aspirated, medium to high speed four-cycle engines requiring a low ash oil

     •  Four-cycle engines experiencing valve face and seat wear

     •  Lean-burn and stoichiometric four-cycle engines operating under high load, high temperature conditions

     •  High-speed four-cycle gas engines used in cogeneration applications

     •  Engines equipped with catalytic converters

     •  Applications using alternate fuels containing low levels of Sulphur or Chlorine

     •  In field gathering operations where sour gas (low levels of H2S) may be used as fuel


Specifications and Approvals

This product has the following approvals:

GE Waukesha Engine 12V/18V 220 GL Applications Using Pipeline Quality Gas

GE Waukesha Engine Cogeneration Applications Using Pipeline Quality Gas


This product is recommended for use in applications requiring:



This product meets or exceeds the requirements of:



Properties and Specifications



SAE 40

Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Viscosity Index, ASTM D2270


Ash, Sulfated, mass%, ASTM D874


Pour Point, °C, ASTM D97


Flash Point, Cleveland Open Cup, °C, ASTM D92




Total Base Number, mgKOH/g, ASTM D2896



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

The Mobil logotype and Pegasus design are trademarks of ExxonMobil Corporation, or one of its subsidiaries.

Organización Terpel S.A.
Address: Carrera 7 N° 75-51, Bogotá – Colombia
Phone: (57) 1 3267878

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 
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.