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AeroShell Diesel Ultra (Case of 12 Liters)

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AeroShell Oil Diesel Ultra is a fully synthetic, multigrade engine oil designed for use in the new generation of compression ignition (Diesel) Aviation Piston Engines. 

The formulation has been selected to be suitable in piston engines fuelled by Jet A or Jet A-1 and is designed for use in the latest highly rated turbocharged diesel engines under all operating conditions. 

AeroShell Oil Diesel Ultra MUST NOT be used in spark ignition, or Avgas powered aircraft engines. 


AeroShell Oil Diesel Ultra is unique in being the only fully synthetic engine oil available in General Aviation. It also contains unique Shell approved additives to provide superior piston cleanliness resulting in a clean, efficient and reliable engine. These additives also include a powerful surface acting additive, which bonds to the surface of highly loaded engine parts, protecting the engine from scuffing damage. 

The oil has been developed with particular reference to excellent component wear protection and engine cleanliness, based on flight experience with diesel aero engines in the field over recent years and substantial engine and component endurance tests will all major Diesel aero engine manufacturers. 

AeroShell Oil Diesel Ultra has been developed to be suitable for use in engines burning Jet fuel and its performance has been optimised to cope with the demands of this unique type of engine/fuel combination. Its key performance features include the ability to sustain high bearing loads, neutralisation of acid build up from the Sulphur present in the fuel and high dispersancy to allow for the relatively high particle loading produced when burning Jet fuel. 

Typical Physical Properties 

Kinematic viscosity (IP 71), cST

@ 40°C 

@ 100ºC 


Density @ 15°C (IP 365), kg/L0.84 
Flash point (IP 34), °C 215 
Pour point (IP 15), °C  –39
HTHS viscosity @ 150°C, mPaS3.50 

Aeroshell Diesel 10w40 replaced by Aeroshell Diesel Ultra 5w30

Aeroshell Oil Diesel Ultra has been developed to ensure that the modern requirements for diesel aviation piston engines are met while maintaing all the existing approvals which are in place for Aeroshell Oil Diesel 10w40.

Aeroshell Oil Diesel Ultra also meets Mercedes Benz Specification 229.5, recognized and required by the leading Diesel aero engine manufacturers.  This product is fully approved by Thielert and also by SMA for their updated engine SR305-230E.

Aeroshell Oil Diesel Ultra is the recommended replacement for Aeroshell Oil Diesel 10w40.  Customers who have been using Aeroshell Oil Diesel 10w40 are advised to now use Aeroshell Oil Diesel Ultra, which is available through Shell Aviation's regular sales channels.


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