ExxonMobil adds new oil to Mobil Pegasus™ series

 ExxonMobil celebrates 50 years of its Mobil Pegasus series with another oil added to the line. The new product was officially launched at POWER-GEN Europe 2015.

The company has launched the new Mobil Pegasus™ 605 Ultra 40, which is the latest generation of gas oil specifically formulated for lubricating gas engines running on biomass and landfill gas. The new formulation will play an important role in driving down the maintenance costs for gas engines operators. Such decrease in costs will be achieved primarily due to extended oil drain intervals which the new product promises. The introduction of Mobil Pegasus™ 605 Ultra 40 reflects the growing popularity of biomass and landfill gas in the gas engine operation; traditionally, lubricants in the Mobil Pegasus™ series have been developed mostly for the engines generating power from natural gas, although not all of them.

Several factors make the use of landfill gas an attractive possibility. First of all, because collecting it from the landfill sites means reducing the methane emissions into the atmosphere.  Apart from this, it allows lessening the dependence on fossil fuels.However, in comparison with the natural gas, landfill gas has a high percentage of contaminants. This makes its usage challenging: being aggressive on the wear performance of the oil, it normally calls for more frequent drain intervals and, as a result, higher maintenance costs.

Bert-Jan Hermsen at POWER-GEN Europe 2015. Image: © NRG Magazine

Bert-Jan Hermsen, Lubrication Field Engineer at ExxonMobil, explains: “That’s why we developed the new oil that can handle the difficult components present in the landfill gas.” Its formulation has been balanced to allow extended oil drain intervals and resist the deposit formation, as well as to provide an improved anti-wear and anti-scuff performance.

According to Hermsen, several big parties in The Netherlands, primarily those operating the combined heat and power units (CHP units), would be interested in using the newly formulated oil in the gas-driven engines. Because these operators have maintenance contracts with the end-user (e.g. hospitals, greenhouses, etc.), it’s critically important for them to reduce the maintenance costs.

One way to do it is to use the right lubrication for the engines.  Hermsen says: “The operators are trying to extend their service intervals and write off one or two service calls per year. We saw the need to develop the oil that would give them a longer oil drain interval. Now we are offering our clients the opportunity to optimize their operation costs by switching to Mobil Pegasus 605 Ultra 40.”

By switching, the operators will benefit from a longer oil life, cleaner engines and prolonged use of engine components.

Finally, Hermsen shares an optimistic outlook on the future of gas technologies. He told NRG Magazine:  “I think we are safe to expect new advancements in the gas cleaning methods. In the future the quality of the bio- and landfill gas might be getting closer to that of the natural gas. Then, for the operators it just won’t make any difference whether to select a special oil for the biogas engine or to go for an oil meant for the engines running on natural gas.”


ExxonMobil adds new oil to Mobil Pegasus™ series


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