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The Benefits of AeroShell Piston Engine Oils

AeroShell Oil 100, W100 and W100 Plus are piston engine oils (PEOs) formulated for use in temperate climates where the outside air temperature is between 16 and 32°C. Because of this, they are often the oil of choice for aircraft operating in Europe and North America, but why should a customer choose AeroShell over other brands on the market?

While AeroShell Oil 100, W100 and W100 Plus are semi-synthetic oils, other manufacturers supply mineral oils. A synthetic oil contains more highly refined base oils than a mineral oil and is produced in a different way. A mineral oil is distilled from crude oil but synthetic oil is made by connecting smaller molecules together in a controlled manner. A big advantage of synthetic oil is that the manufacturer can determine precisely which molecules are in the oil and which characteristics the base oil will have. Because of this, the oil is more stable and ages/oxidizes slower than a mineral oil.

A synthetic oil will also retain its original properties for longer than a mineral oil, because the oil is more resistant to degradation by warmth and has better resistance against acids. Because of this, the oil can keep it’s viscosity for a longer time and can protect your engine for a longer time by lubricating, cleaning and preserving.

Because the alternative products are mineral oils, the cold flow of these products will not be as good as the semi-synthetic oil from Shell. On top of this, Shell have added cold flow improver additives to the oil to enhance the cold flow even further. An oil with a poor cold flow will take longer before it gets thin enough to flow through the engine and lubricate/protect the engine. Because it takes longer for the lubricant to reach out to the engine, the wear of the engine will be more significant. 

Please see the video below for an example of cold flow improvements Shell have made to their oils.

Several additives have been added to the AeroShell piston oils to improve specific characteristics of the oil. For example, the AeroShell Oil W100 cleans the engine and provides a good anticorrosion protection. Other examples of possible improvements from using oils with additives are:

  • Better retaining of the desired viscosity (thickness) of the oil within a wider temperature range
  • Anti-wear
  • Cleaning (sludge prevention)
  • Anti-corrosion
  • Anti-foaming (help the release of trapped air)
  • Poor point depressants (improve the low temperature properties)

Using a good oil extends the lifespan of the engine, saving costs on maintenance and oil changes. These costs are much higher than the additional costs for a good oil.

Finally, the AeroShell W100 is approved to specification SAE-J-1899 SAE grade 50. This is the only product approved to this specification, with alternative products only meeting its requirements. Shell, therefore, cannot change the formulation of the product without new testing and approval by the engine manufacturers.

For further information on Piston Engine Oils, please consult our Knowledge Centre.

Click here to view our full range of piston engine oils.