PROPERTIES

MIL-PRF-23699F

TYPICAL

Grade HTS

Oil Type

Synthetic

Synthetic

ester

Ester

Kinematic Viscosity

mm ²/s

@ 100°C

4.90 to 5.40

5.24

@ 40°C

23.0 min

26.71

@ –40°C

13000 max

11000

Flashpoint, Cleveland

Open Cup

°C

246 min

268

Pourpoint

°C

–54 max

–60

Total Acidity

mgKOH/g

1 max

0.14

Evaporation Loss 6.5 hrs

@ 204°C

% m

10.0 max

2.0

Foaming

Must pass

Passes

Swelling of Standard

Synthetic Rubber

SAE-AMS 3217/1,

72 hrs @ 70°C

swell %

5 to 25

12.9

SAE-AMS 3217/4,

72 hrs @ 204°C

swell %

5 to 25

12.9

standard silicone rubber

90 hrs @ 121°C

5 to 25

8.9

Thermal Stability/Corrosivity

96 hrs @ 274°C

– metal weight change   mg/cm²

4 max

0.23

– viscosity change @ 37.8°C   %

5 max

0.3

– Total Acid Number Change

mgKOH/g

6 max

1.5

Corrosion & Oxidation Stability

72 hrs @ 175°C

Must pass

Passes

72 hrs @ 204°C

Must pass

Passes

72 hrs @ 218°C

Must pass

Passes

Ryder Gear Test, Relative Rating

Hercolube A

%

102

126

Bearing Test Rig (200 hrs)

Type 1¹⁄2   conditions

– Overall deposit demerit rating

35 max

26

– viscosity change @ 40°C

%

0 to +35

30.8

– Total Acid Number change

mgKOH/g

1.5 max

0.98

– filter deposits

g

3 max

0.55

Sonic shear stability

– viscosity change @ 40°C

%

4 max

NIL

Trace metal content

Must pass

Passes

U.S.

Approved MIL – PRF -23699F Grade HTS

British

Equivalent DEF STAN 91-101

French

Equivalent DCSEA 299/A

Russian

Analogue to VNII NP 5 0-1-4F, B3V,

LZ-240, VNII NP 50-1- 4U and 36/Ku-A

NATO Code

O-154

Joint Service Designation

Equivalent OX-27

Pratt & Whitney

Approved 521C Type II

General Electric

Approved D-50 TF1

Allison

Approved EMS-53 (Obsolete)

Honeywell

      TFE 731, TPE 331, APUs (majority of

models), LTS 101, LTP 101, ALF 502,

LF 507, AS907, AS977

Allison (Rolls-Royce)

250 Series

BMW/Rolls-Royce

BR710, BR715

CFM International

CFM-56 (all models)

CFE

CFE 738

GE

GE 90, CF6 (all models), CJ610,

CF700, CT58, CF34

IAE

V2500 Series

IHI

FJR 710

Pratt & Whitney

JT3D, JT8D, JT9D, PW4000 Series (cleared

for flight evaluation in PW2000 engines)

Pratt & Whitney

PT6T, PT6A (some models only), PW100

Canada

Series, JT15D, PW200 Series, PW300

Series, PW500 Series, PW901A APU

Rolls-Royce

RB211-22B, -524, -535, Spey, Tay,

RB183, Adour

Turbomeca

Arriel, Makila, RTM 322, TM 319, TM 333,

TP 319, various models of Astazou and

Artouste engines