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Technical Data Sheet
Eastman™ Turbo Oil 2389

  • Aerospace
  • Aviation turbine oil (ATO)
Key Attributes
  • 3 cSt synthetic lubricant
  • Cold weather

Product Description
Eastman Turbo Oil 2389™ is a low viscosity gas turbine oil, offering exceptional cold-start capability.

Many large commercial airlines use Turbo Oil 2389 in their auxiliary power units (APUs), because of the reliability it affords this equipment when starting after long, cold-soaks at altitude. Turbo Oil 2389 is the only MIL-PRF-7808 Grade 3 qualified oil that is fully approved in all Honeywell and UTC Aerospace Systems APUs. Turbo Oil 2389 is formulated from synthetic base stocks and advanced technology additives, to provide the combined thermal and oxidation stability properties of commercial Type II lubricants, with the low temperature fluidity characteristics of a 3 cSt oil. It also has load-carrying ability equal to, or better than, other approved MIL-PRF-7808 Grade 3 oils.

Typical Properties

PropertyTest MethodTypical Value, Units
     @ 15°CASTM D 12980.9511 kg/L
Viscosity, Kinematic 
     @ 100°CASTM D 4453.19 mm2/s
     @ 40°CASTM D 44512.46 mm2/s
     @ -51°C after 3 hoursASTM D 25327,800 mm2/s
Pour PointASTM D 97-60 °C
Flash PointASTM D92220 °C
Total Acid Number (Average)ASTM D 6640.20 mg KOH/g
Deposition Testa 
     Acid Number ChangeFED-STD-791, 500311.2 mg KOH/g
     Average Viscosity ChangeFED 500317.77 %
     Oil ConsumptionFED-STD-791, 5003100 ml
Evaporation Loss 
     6.5 hrs @ 205°CASTM D 97220.0 %
Foaming Volumeb 
     110°C @ 1000 cc/minFED-STD-791, 321420/8 ml/sec
     110°C @ 1500 cc/minFED-STD-791, 321455/8 ml/sec
     110°C @ 2000 cc/minFED-STD-791, 3214170/18 ml/sec
     80°C @ 1000 cc/minFED-STD-791, 321415/8 ml/sec
     80°C @ 1500 cc/minFED-STD-791, 321445/8 ml/sec
     80°C @ 2000 cc/minFED-STD-791, 3214105/15 ml/sec
Corrosion & Oxidative Stabilityc 
     Aluminium Weight ChangeFED-STD-791, 53070.00 mg/cm2
     Bronze Weight ChangeFED-STD-791, 53070.04 mg/cm2
     Iron Weight ChangeFED-STD-791, 53070.02 mg/cm2
     M-50 Weight ChangeFED-STD-791, 5307-0.02 mg/cm2
     Magnesium Weight ChangeFED-STD-791, 5307-0.02 mg/cm2
     Neut. NoFED-STD-791, 53070.96
     Silver Weight ChangeFED-STD-791, 5307-0.02 mg/cm2
     Titanium Weight ChangeFED-STD-791, 53070.00 mg/cm2
     Viscosity Change @ 40°CFED-STD-791, 53079.5 %

aAverage deposition rating = 0.59
bDynamic foaming characteristics
c96 hrs @ 200°C

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

8/28/2018 3:23:30 PM