Mobil SHC Pegasus™ 40

Synthetic Gas Engine Oil

Mobil SHC Pegasus™ SAE 40​

Mobil SHC Pegasus™ 40 is a new category of advanced technology natural gas engine oil designed to provide today's high output, low-emission four-cycle gas engines with the highest levels of protection. Mobil SHC Pegasus 40 uses a patented combination of high quality base stocks and advanced additive technology to deliver exceptional oxidation stability, nitration resistance and thermal stability. Its formulation has been carefully balanced to provide outstanding anti-wear characteristics and to control the formation of carbon and varnish deposits.


Equipment lubricant recommendations

Our Mobil™ Product Selector tool will help you identify lubricant(s) for your specific equipment.


Features and Benefits

•  Outstanding anti-wear characteristics help to protect heavily loaded valve train components, pistons, liners, bearings, and gear trains

•  Excellent detergent-dispersant system controls the formation of carbon and varnish deposits to minimize oil consumption and maintain engine cleanliness even during extended drain intervals

•  Exceptional oxidation stability, nitration resistance and thermal stability provide the opportunity to extend drain intervals by four to eight times that of conventional gas engine oils

•  Low volatility reduces oil consumption and reduces deposit formation



     •  Turbocharged, naturally aspirated, medium to high speed four-cycle engines requiring a low ash oil

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

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

     •  Natural gas fuelled engines equipped with catalytic converters

     •  Gas engines operating on fuel that contains low levels of H2S


Specifications and Approvals

This product has the following builder approvals:

Rolls-Royce Solutions Augsburg (former MTU Onsite Energy) Gas Engines Series 400 - all engines with natural gas and propane gas

MAN M 3271-2


Properties and Specifications




SAE 40

Ash, Sulfated, mass%, ASTM D874


Density @ 15.6 C, g/cm3, ASTM D4052


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


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


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


Pour Point, °C, ASTM D97


Total Base Number, mgKOH/g, ASTM D2896


Viscosity Index, ASTM D2270



Health and safety

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