Oil selection tool

Oil for Gas Engines

Maximum protection for stationary engines powered by natural gas, biogas, and other gaseous fuels in energy generation systems

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  • Extended Life

    Extended intervals between oil changes

  • Wear Protection

    Maximum protection of engine components

  • Thermal Stability

    Resistance to high temperatures

  • Low Ash Content

    Minimization of deposits in the combustion chamber

Challenges in Industrial Gas Engines

Specific requirements of gas-powered engines demand specialized oils

Stationary gas engines operating continuously in power plants and cogeneration installations are exposed to extreme conditions. High temperatures, aggressive fuel components, and long operating periods require specially formulated lubricants.

Common Problems in Gas Engine Operation

Oil oxidation at high temperatures

Oil oxidation at high temperatures

Gas engines operate at extremely high temperatures, accelerating the oxidation process. Oil degradation leads to the formation of harmful deposits and sludge that clog filters and oil channels.

Acid-induced corrosion

Acid-induced corrosion

Combustion of aggressive gaseous fuels, especially biogas containing hydrogen sulfide, generates aggressive acids. Without adequate alkaline reserve, the oil does not neutralize the acids, leading to engine component corrosion.

Excessive deposits on valves

Excessive deposits on valves

Improper ash content in the oil causes deposits to accumulate on the valves and valve seats, leading to issues with proper combustion process functioning and efficiency reduction.

Oil degradation through nitration

Oil degradation through nitration

Reactions of nitrogen oxides with oil lead to nitration, manifested by increased viscosity. Oil with increased viscosity deteriorates lubrication and increases fuel consumption, potentially causing engine failure.

Cylinder and ring wear

Cylinder and ring wear

Inadequate wear protection under high load conditions leads to premature wear of cylinder linings. This results in reduced compression, increased oil consumption, and costly repairs.

Our Solutions
Choose the optimal oil for your application

  • Mineral Oils Mobil Pegasus

    A proven series of mineral oils for four-stroke gas engines. Mobil Pegasus 1 is ideally suited for engines powered by natural gas or biogas, providing optimal protection and extended oil change intervals.

  • Specialized Biogas Oils

    The Mobil Pegasus series also includes special oils developed for engines powered by biogas and landfill gas. Increased alkaline reserve effectively neutralizes aggressive fuel components.

  • Premium Synthetic Solutions

    Mobil Pegasus 1 is an advanced synthetic engine oil for the most demanding applications. Exceptional thermal stability and extended life in modern high-power engines powered by natural gas.

Need advice? Contact an expert!

How Mobil Solves Gas Engine Problems

  • Oxidation and stability

    Advanced additives providing excellent oxidation resistance and thermal stability

  • Corrosion protection

    Optimal alkaline reserve (TBN) to neutralize acids

  • Deposit control

    Specialist cleaning and dispersing additives keep the engine clean

  • Extended oil change intervals

    Formula ensuring long oil life in the most demanding conditions

  • Wear protection

    Effective protection for all engine components

Why choose Mobil products?

  • Production reliability

    Stable operation without unplanned downtime thanks to extended intervals between oil changes

  • Compliance with regulations

    Certificates and approvals required during engine manufacturer audits

  • Actual savings

    Lower fuel consumption and less frequent changes result in real operating cost reduction

  • Comprehensive support

    Analysis of oil and coolant samples, product selection, and system optimization as part of the collaboration, boroscopy and optimization of replacement intervals

Not sure which lubricant is best for your machine?
Contact our expert! We are happy to help you find the perfect solution.

Proven solutions for every industry

Our portfolio includes products for all industry sectors requiring reliable gas engine operation.

  • Power Plants and CHP Plants

    Power Plants and CHP Plants

    Stationary gas engines in energy and heat generation installations require oils that provide long periods of failure-free operation. Mobil Pegasus guarantees protection in continuous operation mode at full capacity.

  • Cogeneration Installations (CHP)

    Cogeneration Installations (CHP)

    Combined heat and power generation systems operate in demanding thermal conditions. Mobil oils provide thermal stability and protection against degradation at high temperatures.

  • Agricultural and Municipal Biogas Plants

    Agricultural and Municipal Biogas Plants

    Engines powered by biogas are exposed to aggressive fuel components, including hydrogen sulfide and siloxanes. Mobil Pegasus oils are specifically developed to neutralize these threats.

  • Sewage Treatment Plants

    Sewage Treatment Plants

    Utilizing biogas from fermentation processes requires oils resistant to contamination. Our products provide protection against corrosion and deposits in harsh conditions.

  • Waste Landfills

    Waste Landfills

    Landfill gas contains aggressive chemical compounds that require specialized protection. Mobil oils effectively neutralize acids and prevent deposit formation.

  • Mining Industry

    Mining Industry

    Engines powered by mining gas (methane from coal seams) operate in extreme conditions. Our oils provide reliable protection and long life in the most challenging environments.

Need expertise in selection?

Our engineers will help optimize your system for performance and cost.

Three Steps to Success

  • Installation audit

    We assess the engine type, fuel, and operating conditions

  • Solution proposal

    We recommend the optimal oil for your application

  • Operation monitoring

    Regular oil testing allows us to predict and prevent problems

Frequently Asked Questions (FAQ)

  • Gas engine oils have specially developed additive packages ensuring resistance to nitration, deposit control, and appropriate ash content tailored to the type of gas being burned.

  • Oil change intervals depend on biogas quality and engine manufacturer's recommendations, as well as analysis results. We recommend regular oil analyses to determine optimal replacement intervals, which may range from 200 to 2000 operating hours depending on gas quality.

  • In circulating systems every 12-24 months, with manual lubrication, refill regularly. Frequency depends on machine workload and environmental cleanliness.

  • Key parameters include viscosity grade (typically SAE 40), ash level (low/medium ash), total base number (TBN), and oxidation resistance. All must comply with the engine manufacturer's recommendations.

  • We recommend regular oil sampling for laboratory analysis. We monitor viscosity, TBN, oxidation, nitration, and metal content to optimize replacement intervals and detect problems.

  • Synthetic oils like Mobil Pegasus 1 offer extended life, better thermal stability, and protection in extreme conditions. They are particularly recommended for modern high-power engines and applications requiring maximum reliability.

Need more knowledge?
Visit our guide, where you’ll find detailed articles, tips, and case studies.

Start optimizing today

Don’t wait until oil issues affect your engines’ performance. Contact us today for professional advice on selecting the optimal Mobil oil for your installation. We ensure prompt delivery from our warehouse and comprehensive technical support.