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Technical Data Sheet
Eastman™ Turbo Oil 2550


Applications
  • Aerospace
  • Aviation turbine oil (ATO)
Key Attributes
  • Enhanced load carrying
  • Improved thermal and oxidative stability
  • Superior material and equipment compatibility

Product Description
Eastman™ Turbo Oil 2550 builds on the outstanding thermal and oxidative stability in ETO 2197 and offers additional attributes that support our customers’ needs for modern engines and accessories.



Turbo Oil 2550 is AS5780 HPC / MIL-PRF-23699 EE class, 5 cSt turbine oil for the most thermally demanding engine and accessory applications, along with balanced seal and adhesive compatibility for heritage engine reliability.

Typical Properties

PropertyTest MethodTypical Value, Units
General
Density 
     @ 15°CASTM D 12980.9936 kg/L
Viscosity, Kinematic 
     @ 100°CASTM D 4455.08 mm2/s
     @ 40°CASTM D 44525.78 mm2/s
     @ -40°C after 35 minutesASTM D 253211,420 mm2/s
Pour PointASTM D 97-60 °C
Flash PointASTM D92277 °C
Total Acid NumberSAE ARP50880.07 mg KOH/g
Evaporation Loss 
     6.5 hrs @ 204°CASTM D 9723.03 %
Foaming Volumea 
     Sequence 1 @ 24°CASTM D 8925/0 ml/vol
     Sequence 2 @ 93 °CASTM D 8925/0 ml/vol
     Sequence 3 @ 24°CASTM D 8925/0 ml/vol
Thermal Stability & Corrosivityb 
     Metal WeightFED-STD-791, 34110.91 mg/cm2
     Total Acid NumberFED-STD-791, 34110.79 mg KOH/g
     ViscosityFED-STD-791, 3411-2.12 %
Corrosion & Oxidative Stabilityc 
     Aluminium Weight ChangeFED-STD-791, 53080.00 mg/cm2
     Copper Weight ChangeFED-STD-791, 5308-0.31 mg/cm2
     Magnesium Weight ChangeFED-STD-791, 5308-0.03 mg/cm2
     Silver Weight ChangeFED-STD-791, 5308-0.01 mg/cm2
     SludgeFED-STD-791, 53080.5 mg/100ml
     Steel Weight ChangeFED-STD-791, 53080.03 mg/cm2
     Total Acid NumberFED-STD-791, 53080.8 mg KOH/g
     Viscosity @ 40°CFED-STD-791, 530812.26 %
Sediment 
     Metal WeightFED-STD-791, 30100.4 mg/cm2
     Sediment, 1.2 µm filterFED-STD-791, 30101.3 mg/L
     Visual Undissolved WaterFED-STD-791, 3010None

a@ 1 minute setting
b@ 274°C
c72 hrs @ 204°C



Comments
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.

7/14/2026 10:32:14 AM