Brand
Shell
Type
Aviation turbine oils
Primary standard
Joint Service Designation OX-7
Manufacturer code
001A0081

AeroShell Turbine Oil 390

3 mm²/s synthetic diester oil for aircraft turbine engines

Specifications

Brand
Shell
Manufacturer code
001A0081
Availability
On order

Manufacturer's description

Synthetic lubricating oil for aircraft turbine engines. AeroShell Turbine Oil 390 is a 3 mm2/s synthetic diester oil incorporating a carefully selected and balanced combination of additives to improve thermal and oxidation stability and to increase the load carrying ability of the base oil.

Applications

  • AeroShell Turbine Oil 390 was developed primarily as an improved 3 mm 2 /s oil for British turbo-jet engines. AeroShell Turbine Oil 390 is fully approved for a wide range of turbine engines.
  • More recently, because of the low temperature characteristics of AeroShell Turbine Oil 390, there is interest in using this oil in auxiliary power units (APU) in order to overcome the effects of cold soak. Normal practice is to shut down the APU during cruise, the APU then experiences cold soak, often prolonged, and when the unit is started there is considerable difficulty resulting in the unit not coming up to speed in the given time, thus causing a hung start.
  • In such cases where the APU is subject to a long cold soak the viscosity of standard 5 mm 2 /s oils used in the APU will increase from 5 mm 2 /s at 100 0 C to typically 10,000 mm 2 /s at –40 0 C. At this much higher viscosity the oil cannot flow easily leading to a large viscous drag within the APU, thereby contributing to the difficulty in starting. AeroShell Turbine Oil 390 on the other hand experiences a much smaller viscosity increase (typically 2000 mm 2 /s at –40 0 C) with a reduction in viscous drag which is often sufficient to overcome hung start problems.
  • All experience to date shows a considerable improvement in cold reliability of the APU when AeroShell Turbine Oil 390 is used.

Performance & benefits

  • Pratt & Whitney: APS Series for 3cSt oils, PW901, PW980

Standards & approvals

  • Joint Service Designation OX-7
  • Honeywell: All APUs for 3cSt oils
  • Rolls Royce: Spey & Tay

Approved for

  • Pratt & Whitney

Typical characteristics

PropertyTypical valueMethod
Oil typeSynthetic ester
Density @15°Ckg/m3924ISO 12185
Kinematic viscosity @40°Cmm2/s12.9ASTM D445
Kinematic viscosity @100°Cmm2/s3.4ASTM D445
Kinematic viscosity @-54°Cmm2/s<13 000ISO 3104
Total aciditymg KOH/gPassesSAE-ARP-5088
Foaming characteristics Sequences I,II,III Tendency/Stabilityml/mlPassesASTM D892
Trace metal contentppmPassesASTM D4951
Elastomer compatibility, %Def Stan 05-50Passes
CorrosivityDef Stan 05-50Passes
High Temperature oxidativeDef Stan 05-50Passes
Load carrying abilityPassesIP 166

Complete documentation

We email you the sheets listed below in a single archive. No account, no order required.

  • TDSENJuly 2026
  • SDSENFebruary 2025
  • SDSROFebruary 2025

Where should the files go?

We send the archive to the address below. It is the only field we need — the rest only help us reach you if a sheet is missing.

What you get

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