Low Viscosity Aviation Chemicals AeroShell Turbine Oil 390 3cS Double Ester TEO

AeroShell Turbine Oil 390, A 3cS Low Viscosity Double Ester Synthetic Oil (TEO)

Synthetic lubricating oil for aircraft turbine engines

AeroShell Turbine Oil 390 is a 3 mm2/s synthetic diester oil incorporating a carefully selected and balancedcombination of additives to improve thermal and oxidation stability and to increase the load carrying ability of thebase oil.

Main Applications

AeroShell Turbine Oil 390 was developed primarily as animproved 3 mm2/s oil for British turbo-jet engines. AeroShellTurbine Oil 390 is fully approved for a wide range of turbineengines.·More recently, because of the low temperaturecharacteristics of AeroShell Turbine Oil 390, there isinterest in using this oil in auxiliary power units (APU) inorder to overcome the effects of cold soak. Normal practiceis to shut down the APU during cruise, the APU thenexperiences cold soak, often prolonged, and when the unitis started there is considerable difficulty resulting in the unitnot coming up to speed in the given time, thus causing ahung start.In such cases where the APU is subject to a long cold soakthe viscosity of standard 5 mm2/s oils used in the APU willincrease from 5 mm2/s at 1000C to typically 10,000 mm2/s at–400C. At this much higher viscosity the oil cannot floweasily leading to a large viscous drag within the APU,thereby contributing to the difficulty in starting. AeroShellTurbine Oil 390 on the other hand experiences a muchsmaller viscosity increase (typically 2000 mm2/s at –400C)with a reduction in viscous drag which is often sufficient toovercome hung start problems.All experience to date shows a considerable improvement incold reliability of the APU when AeroShell Turbine Oil 390 isused.

Specifications, Approvals & Recommendations

DEF STAN 91-94

Russia: analogue to IPM -10, VNII NP 50-1 4f and 4u, and36Ku-A

Joint Service Designation OX-7APUs:

Honeywell: All APUs for 3cSt oils

Pratt & Whitney: APS Series for 3cSt oils, PW901, PW980Industrial Gas Turbines & Marine:

Rolls Royce: Spey & TayFor a full listing of equipment approvals andrecommendations, please consult your local Shell TechnicalHelpdesk.

Typical Physical Characteristics

FAQ

Q:Why we choose the ASTO390?

ASTO 390 can help to improve auxiliary power unit (APU) starting reliability, particularly coldsoak starting. It is a 3-cSt synthetic diester oil incorporating a carefully selected and balanced combination of additives to improve thermal and oxidation stability and to increase the loadcarrying capacity of the base oil.

Q:ASTO 390 is approved for use in all models of the following engines:

A:Honeywell GTCP30, 36, 70, 85, 331 and 660 APUs, starters and turbocompressors

Turbomeca Astazou, Artouste, Bastan VII, Marboré 6, Makila and Turmo

Rolls-Royce Conway, Spey, Tay and M45H

Pratt & Whitney Canada PW901A APU

Hamilton Sundstrand APS 500, 1000, 2000 and 3000.