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 oder Jet A-1 and is designed for use in the latest highly rated turbocharged diesel engines under all operation conditions. AeroShell Oil Diesel Ultra MUST NOT be used in spark ignition, or Avgas powered aircraft engines.

AeroShell Oil Diesel Ultra is approved to Mercedes Benz Specification 229.5, recognised and required by the leading Diesel aero engine manufacturers.

AeroShell Oil Diesel Ultra is approved for use in the following engines. Whilst this is correct at the time of writing, testing is ongoing to extend this approval listing as new engines are produced.

• Thielert/Centurion Engines: 1.7 & 2.0 Centurion (Other models yet to be produced)
• SMA: SR305-230E
• Austro Engine: AE300
• Mercedes Benz: MB229.5
• ACEA: Meets the requirements of A3/B4
• API: Meets the requirements of SL/CF
• SAE: Viscosity grade 5W-30