How Many? A Dictionary of Units of Measurement
© Russ Rowlett and the University of North Carolina at Chapel Hill

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About the Dictionary
Using the Dictionary

ISO Viscosity Grades

Data from the web site of C&C Oil Company.

ISO Viscosity Grade Numbers

Viscosity Grade Ranges

(centistokes at 40 °C)

Minimum

Maximum

2

3

5

7

10

15

22

32

46

68

100

150

220

320

460

680

1000

1500

1.98

2.88

4.14

6.12

9.00

13.5

19.8

28.8

41.4

61.2

90.0

135

198

288

414

612

900

1350

2.42

3.52

5.06

7.48

11.0

16.5

24.2

35.2

50.6

74.8

110

165

242

352

506

748

1100

1650
Note: The viscosity grade numbers of the ISO are the same as those of the ASTM and BSI. The viscosities for the ISO grades are measured at 40 °C, while those of the ASTM and BSI are measured at 100 °F (37.8 °C). Lubricants of a given ASTM or BSI grade are slightly more viscous than lubricants of the corresponding ISO grade.

 

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All material in this folder is copyright © 2000 by Russ Rowlett and the University of North Carolina at Chapel Hill. Permission is granted for personal use and for use by individual teachers in conducting their own classes. All other rights reserved. You are welcome to make links to this page, but please do not copy the contents of any page in this folder to another site. The material at this site will be updated from time to time.

March 3, 2000