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Approximate ISO grade

15

22

68

100

150

- -

Average molecular weight

amu

2,000

2,400

3,200

3,700

4,100

- -

Kinematic viscosity

at 20 °C

at 40 °C

at 100 °C

%

%

%

9

–

–

6

20

–

–

2

–

–

2

15

–

0.7

1.7

ASTM D445

Viscosity index

60

73

100

108

117

ASTM D2270

Pour point

°C

– 58

– 50

– 45

– 35

– 30

ASTM D97

Evaporation weight loss

at 120 °C, 22 hr

at 149 °C, 22 hr

at 204 °C, 22 hr

%

%

%

9

–

–

6

20

–

–

2

–

–

2

15

–

0.7

1.7

ASTM D2595

Surface tension at 20 °C

dyne/cm

21

21

21

22

22

ASTM D1331

Density at 20 °C

g/cm3

1.87

1.88

1.89

1.9

1.91

ASTM D4052

Four ball wear test

(at 75 °C,1 hr, 1,200 rpm,   40 kg)Avarage scar diameter

mm

0.51

0.63

0.66

0.66

0.81

ASTM D4172