PROPERTIES

MIL-PRF-7808L

TYPICAL

Grade 3

Oil type

Synthetic ester

Synthetic

ester

Density @ 15°C

kg/l

–

0.956

Kinematic viscosity

mm²⁄S

@ 100°C

3.0 min

3.1

@ 40°C

11.5 min

12.0

@ –40°C

–

2400

@ –51°C

17000 max

12000

Viscosity stability

Must pass

Passes

Pourpoint

°C

–

Below −62

Flashpoint, Cleveland

Open Cup

°C

210 min

235

Total Acidity

mgKOH/g

0.3 max

0.15

Trace metal content

Must pass

Passes

Evaporation 6.5 hrs @ 205°C % m

30 max

20

Silver – bronze corrosion @ 232°C

– silver

gm/m²

± 4.5 max

0.01

– bronze

gm/m²

± 4.5 max

0.05

Deposit Test

– deposit rating

1.5 max

0.8

– neutralization number change

%

20 max

2.0

– viscosity change @ 40°C

%

100 max

12.0

Storage stability

Must pass

Passes

Compatibility

Must pass

Passes

Elastomer Compatibility

SAE-AMS 3217/1,

168 hrs @ 70°C            

–

%  swell

12 to 35

27

SAW-AMS 3217/4

72 hrs @ 175°C

–

%  swell

 2 to 25

  16

– tensile strength change

%

50 max

30

– elongation change

%

50 max

3.5

– hardness change

%

20 max

9.0

SAE-AMS 3217/5

72 hrs @ 150°C

–

%  swell

2 to 25

Passes

– tensile strength change

%

50 max

Less than 50

– elongation change

%

50 max

Less than 50

– hardness change

%

20 max

Less than 20

Static Foam Test

– foam volume

ml

100 max

30

– foam collapse time

secs

60 max

15

Dynamic foam test

Must Pass

Passes

Corrosion and oxidation stability

Must Pass

Passes

Bearing deposition stability

– deposit rating

60 max

<60

– filter deposit weight

g

2.0 max

<2

– viscosity change @ 40°C

–5 to +25

Passes

– acid number change

mgKOH/g

1.0 max

<1

– metal weight change

mg/cm²

±0.2 max

Passes

Gear load carrying capacity

Must Pass

Passes

U.S.

Approved MIL – PRF – 7808L Grade 3

British

–

French

–

Russian

–

NATO Code

O -148

Joint Service Designation

OX – 9